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User Centered Design


I'd gotten an email on the account I use for posting to usenet
groups. One of the things I do on the side is build gadgets using single
chip microprocessors called PICs. I watch a number of usenet groups dealing
with the things, and often post what I hope are answers to questions people
have, building gadgets when I feel like it.

This request was for a fairly simple and specific motor control
gadget. Press a button and hold it, the motor turns on. Release the button
and the motor turns off. The trick is the gadget learns the "on" and "off"
times and repeats them until the button is pushed again, and it trains to
new times. Sounded pretty easy; I'd never built one before.

We traded emails; I needed more detail. What kind of motor? How
big? What were the ranges of on and off times? Does it need to run on
batteries, self contained, or can it be built into a larger enclosure? Do
you want automatic shutoff after a preset time? Do you want indicator
lights or beeps?

I learned quickly that my client was a high level software type,
with no hardware background. When I asked if it was an AC or DC motor, they
didn't know. Okay, does it run on batteries? Yes. How many of what size?
Two small ones. Make that a negative hardware background, but we're making
progress.

I was getting frustrated and needed more information, email was
just too slow. I sent out my work phone number and told them to give me a
call so we could talk details. I had the code pretty much worked out, using
a small PIC to control a blue LED in time to a pushbutton. The critical
hardware part was going to be motor control; I needed specifics on the
motor.

A couple mornings later I got a phone call. I answered and a female
voice asked for my email name. Yup that's me, I said. I gave her my first
name; she'd get that if she left me voicemail. Her name was Emily. We
chatted for a few minutes. She thought she recognized the phone number and
asked where I worked; I told her. She told me where she worked, another
high tech company a few miles away.

I don't remember who suggested it, but we agreed to get together to
talk at her office. I looked at the schedule on my wall and told her I
could be there a little after four, and would need to leave shortly after
five. No problem, she told me, that's about when she needed to leave as
well.

She gave me her extension and told me to giver her a ring when I
got to the lobby. Then I told her I'd be wearing a black leather jacket,
white shirt, and a black tie with red chili peppers on it. "Really?" she
squeaked over the phone. I laughed; she really did squeak. I told her it
was a hard tie to miss. She started laughing and said she'd see me later
that day. Was there something familiar about that laugh? I was looking
forward to meeting her; I'd spent too long focused only on work. Jennifer
was gone; it was long past time for me to move on.

Now for economics. I work in the Silicon Valley; it's a great place
to work. It's also a rotten place to live; housing prices are astronomical.
So I live in what's called the "East Bay" and commute on the bus. It works
out well; company employees get free bus passes. The bus stop is a couple
blocks from my house, and I get dropped off right in front of the office.
The bus is comfortable; the seats recline, and it beats the hell out of
driving at least an hour and a half twice a day in ugly traffic. It's also
a great way to get out of late afternoon meetings. "Got to go, can't miss
my bus!"

I took an earlier bus that afternoon and got off at Emily's place.
Her company is also part of the commute program; they have a very nice bus
stop right in front of their main building. I went in and gave her a call
from the lobby; she laughed when I said hello and said she'd be right down.

A few minutes later as I was standing around in the lobby I heard
her call my name. I turned around and realized why she'd squeaked when I
told her what I was wearing, and why she'd been laughing. When I saw her I
started laughing as well; we'd ridden that damn bus together most days of
the week for the last two years. We hugged and we went to a small
conference room off the lobby.

That Emily, the one from the bus; she's about my height, long black
hair, good waist, and strong slender legs. Her Hindu heritage blessed her
with clear dark almond skin, beautiful oval eyes, and a pair of firm, full
breasts that make my mind go blank. She has a wonderful laugh, and the kind
of laid back personality required to survive the commute.

"I couldn't believe it was you." she said when we sat down, still
laughing a bit.

I shook my head. We sat together sometimes; I wouldn't mind sitting
next to her more often. Neither of us were real conversationalists on the
bus, we tended to read or sleep. We swapped books and magazines all the
time, even working out an informal trade; I brought along The Economist and
she brought New Scientist. We chatted for a couple minutes, then I looked
at my watch.

"We could take the express bus and talk on the way, we'd be more likely to
get seats."

She nodded. "I thought so too. My bag is ready to go."

"So, I need more details about the motor you want to run."

She lowered her head and blushed a little. I didn't know what to do
with that. "Can you get me one to work with? I only need the motor, not the
rest of whatever it is." Maybe that would be easier to handle.

She looked up at me with a funny smile, still showing some
embarrassment. "I... I can get you one of the motors." Were her nipples
sticking out a bit through her blouse?

I changed topics a bit. "Okay, that will be a big help. I still
have hardware choices to make. Do you want any feedback that it's working?
A light? Sound?"

She responded when I said "feedback" with a look of shock or
surprise, then smiled and said "No sound, a small light would be okay."

We talked a little more. I let her know that I could either run the
motor full off to full on, or possibly let it run at a slower pulsed rate,
then kick it up to full, she should think about it. She told me she'd like
a way to turn it off quickly; I let her know that wouldn't be a problem.

We took a break to visit the plumbing; she got her bag and we went
out to the bus stop. Since it was an earlier bus than usual for us, we got
seats easily; where I got on, I usually got a seat, sometimes Emily didn't.
I told her I'd be sure and save her a seat from now on.

Once we started out, both of us reclined our seats. I was sitting
next to the window, Emily to my right. I looked over to her and held out my
right hand.

"Emily, I'm going to close my eyes. I want you to pretend I'm not
here, and my hand is the button for your controller. I want you to go
through how you'd normally use it, rates, durations, as best as you can
figure. I need to know this to set the timing parameters. When you're
through, squeeze my hand. Okay?"

She looked a little hesitant, then nodded. I smiled, leaned back,
and closed my eyes.

After a bit I felt her hand on mine, it felt like her right hand
reaching over. I moved my hand out a little, and she set it on a book in
her lap. She started out tapping on the back of my hand slowly, evenly,
about twice a second with her middle finger. Okay, I thought, this is easy,
tenth of a second sampling will work. Then she started speeding up; tenth
of a second is too long a sample interval. Then the "on" time started
getting longer than the "off" time, until it was "on" for a little more
than a second, and "off" briefly. Then it was "on" continuously for quite a
while, a minute or so, then she squeezed my hand.

I pulled my hand back into my lap and thought. Okay, use about five
hundredths of a second for the sample interval, and a set of sixteen bit
counters. How long do we have to go before we declare "on" continuously?
12.8 seconds would be overflow from the lower 8 bits to the upper 8 bits, a
convenient point.

I opened my eyes. Her eyes were closed; it looked like she was
perspiring, and breathing a bit fast. "Emily?" I asked. She opened her eyes
and smiled, again giving me a sort of blush.

I smiled back. "Like to talk design decisions a bit?"

She said "Sure."

We talked about timing; I gave her my initial ideas, letting her
know we could alter things; this was just a first hack. She agreed that
about ten to twelve seconds was a good point to go to continuous "on" for
her mystery motor. We both understood the nature of software; you build the
first version expecting to learn a great deal, and expecting to throw it
away. When I asked if there was anything else, she surprised me. She lifted
the armrest between the seats and said "I'd like to hold your hand again."

I held out my hand and she took it in hers gently. Then she leaned
on my shoulder and closed her eyes. That seemed to be the thing to do; I
did the same, and was soon asleep.

Luckily we watch out for each other on the bus. I woke up with the
driver announcing a stop two from where I get off. Emily squeezed my hand;
I looked at her and smiled, she had a very peaceful look on her face.

"Where do you get off?" I asked her; she was always on the bus when
I got on in the morning.

"The stop after you." she told me, with a chuckle in her voice and
a little blush. What had I said that was so funny?

"Would you like to go out to dinner with me tomorrow?" I asked. "I
promise not to talk about the project for you if you don't want to."

She laughed. "That would be nice. I'd like that."

"Good." I said, standing up and grabbing my bag. "I'll see you
tomorrow morning. Sweet dreams."

She laughed and blushed again, putting a hand up over her face. I
got off the bus wondering what the hell was going on, what was I missing?

I pretty much finished the code that night, testing it with my
light emitting diode, and prototyping the motor driver. I sat at my
workbench in the spare bedroom pushing the button for a while, then watched
as it took over repeating the pattern. I could speed it up, slow it down,
or turn it off; not bad.

The next morning when I got on the bus Emily had saved me a seat.
"Good morning." I said as she picked up her bag for me to sit down. She dug
into hers and pulled out a little plastic bag with a small motor in it; she
had a Band-Aid on her hand.

I took the offered bag and asked "Cut yourself?"

She laughed and said "Yes, but not bad, not being careful enough.
I'll stick to software."

I took the motor out of the bag and looked at it. It was about the
same diameter as my thumb, a little over an inch long. It looked like
something had been pulled off one end of the shaft. I tried turning it with
my fingers, it didn't want to budge. It was either very powerful or
destroyed. I'd do an autopsy later.

We talked for a bit about dinner and the upcoming day. She'd made
reservations for us for dinner at a fish place we went past on "our" side
of the bay; that way we could take local busses home anytime we wanted.

We settled back into our usual morning routine, except that she
once again lifted the armrest between the seats, took my hand, and leaned
on my shoulder.

We snoozed again, waking when one of her cow-orkers called her name
just before her stop. We both sighed and smiled; she touched my cheek with
a hand as she got up.

I got a closer look at the motor later that day; it was trashed. I
got it to turn in my fingers, but the brushes were destroyed. But that
wasn't what I was thinking about; she'd touched me and smiled. That felt so
wonderful, and yet at the same time reminded me of how empty my life was.

I got on the usual bus home that afternoon, saving a seat for
Emily. She was lucky; if I hadn't she wouldn't have gotten one. We settled
in and I asked "Read?" Are you going to read on the way home? She raised
the armrest in reply, and reclined her seat. I did the same. As I was
offering her my hand, she reached an arm around me and pulled me over on to
her shoulder. How could I refuse an offer like that?

Our driver announced the restaurant name loudly over the intercom,
waking us. Emily must have told him, as it wasn't the usual stop for either
of us. We got off together thanking him, and our arms went around each
other as we walked from the bus stop.

Dinner was good, but got off to a slow start. I didn't know what to
say. We worked for competitors, so we both knew work discussions were no
good. I told her I wouldn't talk about the gadget.

After a few minutes, though, she squeezed my hand and said "Roger,
what's the matter?"

I shook my head, closed my eyes, and quietly explained my dilemma.
When I heard her laughing softly, I opened them again. I hadn't mentioned
that watching her breasts was not doing well for my concentration.

She told me she understood. She was mildly surprised I didn't have
a steady girlfriend.

I smiled and told her I was between girlfriends; I'd learned that
no matter how well you think a relationship is going, if one person says it
isn't going well, they're right. I still wasn't sure what had happened;
well, she was sure she'd found someone better.

We waxed a bit philosophical after that. She visited the ladies'
room, and when she returned to the table her blouse was unbuttoned
substantially, and I could tell her nipples had perked up. I took a deep
breath when I noticed that, then looked in her eyes. She gave me a very
intense look and a smile; no accident there.

We more or less split the check. We walked back to the bus stop arm
in arm. She'd put on perfume and it was driving me crazy. When we got to
the bus stop, we stood there looking at each other.

"Well?" she asked me.

I sighed. "Emily, I'd like to kiss you and squeeze you and..."

I was interrupted by her closing her eyes and pulling me to her. I
put my arms around her and we kissed. I held her gently, arms around her
shoulders. Too gently it seemed; she turned me around so my back was to the
side of the bus stop and pressed into me from hips to shoulders. I felt her
waist as we kissed, moving my hands up her back. I could feel her nipples
burning into me. She moved one of my hands to her front; I gently squeezed
a breast and she moaned as we kissed.

We broke for air a little before the bus arrived. We stood there
looking in each other's eyes with the bus waiting there until the driver
yelled out "Next bus is in twenty minutes. You getting on?" She pulled me
to the bus; we grabbed our bags and got on.

We didn't get seats, so we stood there in the aisle holding on to
each other, then kissing. I didn't know what to do as we got to my stop.
Should I ask her to come with me? My indecision let her make the choice.
She squeezed my hand and said "Here's your stop. I'll see you in the
morning." With that we got in one more deep kiss, and I got off the bus.

I sighed as I stood there watching the bus pull away. Then my legs
went on automatic pilot and took me back to the house. Nothing but junk and
bills in the mail; it looked like I had two choices for the evening. I
could take matters into my own hands, or I could go for sublimation and
work on the gadget. I wanted to take another whack at that motor, and I
thought I had something similar in a junk box in the garage.

It only took me a few minutes to find a similar motor in a box in
the garage. I took a look at the one she'd given me under a magnifier; the
brushes were shot, really worn out. I hooked up my junk box motor to the
prototype and tried it. I put the motor between the soldering iron and a
large transformer to keep it from hopping all over the bench as it pulsed
on and off. I had to add a little more snubbing on the motor and the mosfet
switch, but it worked like a charm. I put the switch/LED combination on the
end of three feet of wire, and the motor on a longer piece of wire. The
remaining circuitry was on a small piece of copper circuit board about an
inch on a side. I fooled with the code for too long, finally flicking it in
for the night. I have to get up early for the bus.

I was brushing my teeth when I thought of that motor hopping
around. Could that be it? I looked at myself in the mirror. That could be
it; the timing was right. Oh well, we'll find out soon. I rinsed my mouth
and went to bed.

When I got on the bus the next morning I didn't see her at first,
then I noticed her farther in the back. I sat next to her; she'd already
pulled the armrest up.. "Hi. Thanks so much for last night. I..." I spoke
as I put my bag down on the floor. When I sat up again she flung her arms
around me and pulled me to her. I didn't need encouragement. We kissed and
our hands roamed all over each other, touching, squeezing, feeling, digging
in with fingernails. At one of the stops we heard a gal walk by and say "Oh
wow. Nerds in lust." We laughed at that and came up for air. We'd seen and
heard some pretty torrid stuff on the bus. I never thought I'd be part of
the show.

As we got close to her office I had a hand inside her blouse,
feeling her through her bra. She had a hand inside my shirt as well. She
made a mad dash at rearranging herself, kissed me once more, and scrambled
off the bus leaving me panting. Damn, I didn't tell her about the motor.

A few minutes later I got of at my place. One of my coworkers on
the bus, a gal in marketing, complimented me on the show we'd put on. I
smiled and thanked her, I hoped we'd do it more often. As we walked up to
the building though I could feel a very bad case of blue balls -- I hurt.

I gave Emily a call about half an hour later.

"I don't think I've ever enjoyed a bus ride as much as this
morning." I told her.

She laughed, eventually saying "I enjoyed it as well. And dinner
last night."

We chatted for a couple of minutes, then I told her.

"I've got good news and bad news."

"Oh?"

"The good news is that I've got what I think is an operating
prototype. The bad news is that the motor you gave me yesterday was dead."

"Hmmm... I'll think about that." She sighed for a bit, then laughed
again. "We'll talk this afternoon. Save me a seat in the back."

"I'll save you a seat. I'm looking forward to seeing you again,
holding you."

That got a sigh. "So am I. I'll see you this evening. Think about
me. Bye."

"Bye." I hung up the phone. Think about her? How could I not think
about her? What if my guess was right? She seemed to be interested in me, I
wanted her very much, yet was worried about chasing her off. I needed her
very much. I thought Jennifer and I had been so happy, things had been
going so well. I'd been wrong; it hurt then and it hurt now. I know she was
just out of college; she told me "People grow, they change." I know that; I
thought we could grow together, change together. Had I just been a
convenient transition out of school, as Susan said? Sigh. Introspection can
be painful. But waking up alone in the morning is even more painful. For
the last few months, how many months had it been since she moved out? I'd
thrown myself into my work, into side projects, working out. My boss was
happy, the people I built gadgets for were happy, so why wasn't I?

That was a very long day, and a very slow bus getting to her
office. I smiled when I saw her; she had a big grin on her face. I was
sitting next to the window.

"Scoot over so I can have the window." she said. I scooted over and
started to stand up.

"No, I'll slide over." she told me. Then she sat on my lap and gave
me a couple slow sensuous wiggles before sliding over to the seat, just as
I was about to grab her breasts from behind.

I probably looked dazed; she asked "Did you have a long day?"

I told her I did, it had gone very slow, I'd also stayed up too
late working on the gadget.

She said "Then you can rest on the way home." She pulled one arm
and put a hand around my neck, pulling me into her lap, resting my head on
her soft full bosom. I sighed; make that a soft but firm and perfumed
bosom; she smelled delicious. I could smell her perfume, feel her warmth,
hear the beat of her heart. My mind spun for a while and then I surprised
myself; I went to sleep.

She woke me with a squeeze. I took another deep breath of her
perfume and kissed her through her blouse, then sat up. "Thank you. I miss
naps."

She chuckled. "We should do that more often, it was nice."

"No, it was incredible. See you in the morning?"

She gave me a smile and put a hand on my leg. "I thought I could
bring over another motor tonight, say around eight? Would that work?"

My mind almost stripped its mental gears as I went from delirium to
shock. The place was pretty clean, I should take care of the kitchen. I'm
pretty neat and tidy all in all. Should I give the bathroom a quick going
over?

"That would be great. Bring the motor, whatever you need. It
shouldn't take long."

She leaned back and with a raised eyebrow said "I was thinking of
bringing my pillow..."

I didn't know what to say. She started laughing and reached up and
closed my mouth.

"This is your stop. I'll see you at eight."

I got off the bus. Gee, last night when I stood here I was dazed.
Tonight standing here I'm dazed. Oof, I've got some work to do. Pillow? It
doesn't matter if I was right or not, I guess.

I headed home and had a quick bite to eat, then did a whirlwind job
on the bathroom and the kitchen. I was almost thanking my parents for
harping at me all those years and turning me into a neat freak. I live in a
little three bedroom house. One of the bedrooms is a real bedroom, one is
an office - workshop for electronics and computer stuff, and the third is
the library - guest room with a futon. I'd just finished a dusting pass
when the doorbell rang.

I answered the door; I guess I was out of breath, because as soon
as she saw me she started laughing. She was carrying her work bag, a small
suitcase, and a pillow. I stepped to the side and invited her in.

"Been busy?" she said as she put down her things and gave me a kiss.

I was going to answer but got distracted. We kissed and hugged. She
handed me an old copy of The Economist; that's how she had my address.
"Give me the tour?"

I gave her the tour of the house. She remarked how tidy things
were; I told her it was the result of many years of beatings; I kept the
place pretty well picked up. She sat down on the futon in the library and
leaned back, as if she was trying it out for size. She looked delicious.
How was this going to unfold? What should I do?

We ended up in the office. I pointed to the prototype, sitting on a
piece of circuit board in a small vise on the bench, the batteries, switch,
and motor hanging off on wires. "Well, there it is. Where's your motor?"

She looked around the room a bit. "Can we move this into the other
room by the futon?" She picked up the switch and pushed it a couple times,
watching the motor go on and off at the same rate. Did I see her nostrils
flare? The way she looked at that motor, I had to be right.

"Sure." I told her. "I can move it in there."

She hit the switch quickly and the motor turned off. She gave me a
very intense look and said "Good; why don't you move it in next to the
futon and get whatever you'll need to connect up the motor; it already has
a wire going to it. I'm going to the bathroom and then I'll join you."

She stepped out and I moved the gadget to the little table next to
the futon. I got my wire cutters, and the soldering iron as well. I was
thinking what other tools I'd need when she came into the room carrying a
small paper bag.

"Do these lights dim, or do you have any candles? These are pretty
bright."

I hit the switch, dimming the lights down. "How's that? I may have
to put them up again to connect the motor."

She smiled and sat on the futon. Her shoes and socks were off; her
blouse half unbuttoned. She reached in the bag and pulled out a little
plastic battery holder with a switch on the side, a wire going to the other
end still in the bag.

"Here. You can cut this off and hook it up. Leave the other end in
the bag for now."

Okay, I looked at the wire; two conductors, should be safe. I
clipped off the battery box, stripped the wire ends, cut off my old motor,
and spliced the wires together. I looked up at her, waiting for her to make
the next move.

"Can you get me a small towel?" she asked. "And dim down the light
a bit more?"

"Of course. Be right back." An encouraging sign; I dimmed the light
some more then went to the bathroom and grabbed a towel off the bar.

When I walked back into the room I was stunned. I knew what was
going to happen, but I didn't know what she was going to do. She'd taken
off her blouse and her pants, and was taking off her bra. She smiled to me
and pointed to a spot on the floor next to her. "Have a seat. I want to
show you what you've made."

I sat down on the floor and handed her the towel. Her nipples
looked magnificent. She got up a little and put the towel underneath her,
then slipped off her panties. She looked me in the eye as she pulled the
wire out of the paper bag. At the other end of the wire was an egg shaped
thing, maybe two inches long and an inch or so in diameter. She relaxed
back on the futon, still looking me in the eye, and put the egg in her
mouth for a moment. She seemed to roll it around, turning it, then she took
it out and with her legs together slowly slid it down her thatch, using her
other hand to spread her lips gently and position it.

Both of us were breathing heavily. I had the erection of my life,
and her nipples were crinkled and pert. I thought I could smell her scent
as well as her perfume.

She picked up the switch, leaned back, and tapped the button a
couple times. "Ooh!" she moaned, moving her hips and hitting the button.
After a few seconds she let the switch dangle in her hand. In the dim light
of the room I could see the LED blinking on and off as she writhed on the
futon. I remembered to breathe again. She hit the button again, changing
the rhythm, speeding it up. After a few seconds more she changed it again,
this time more on than off. I got up and moved to her, touching a breast
gently.

Her eyes sprang open, wide with a glazed animal look as she hooked
her other hand around my neck and pulled my head to her breast. I latched
on to her nipple and put my hands around her waist as she moaned more,
arching her back, holding me to her.

After not too much longer I felt her stiffen and a low, long cry
started coming out of her. I held her to me, feeling her warmth, tasting
her, hearing her pleasure; she squeezed me and pulled my hair, then went
limp on the futon and in my arms. I sucked contentedly for a while, then
moved to kiss her other breast, then rested my head on her, feeling the
warmth of her chest and hearing her heart beating rapidly.

It took a while for her breathing to settle. She moved a bit and I
sat up, putting a hand on her knee and moving it slowly up her thigh. I
wanted her, especially after that show.

She smiled. "It works. That was great."

I shook my head. She laughed then growled "Strip!"

I started peeling off my clothes. She stood up slowly, letting the
switch and the vibrator fall to the futon, then pulled the futon out full
length. When I was naked she pointed to it and said "On your back."

I moved over to the futon and lay on my back. She reached into the
paper bag again and pulled out a little foil package, opening it and taking
out a condom. She moved next to me on the futon and with one hand caressing
my balls, put the condom on me with the other. "Sit up." she told me.
"Please."

I sat up on the futon, and she sat in front of me, then moved into
my lap, taking me into her. I crossed my legs and she rested on me,
wiggling into place. I moaned and my eyes closed, I leaned back, my arms
behind me propping me up.

Then I felt something else and opened them again; she was sliding
the vibrator back, now positioned between the base of my cock and her
nether lips and clit.

"Sit up and kiss me, please." she said softly.

I sat up and put my arms around her, feeling her breasts against
me, and we kissed. She moved her hips slowly side to side. I leaned my head
down a bit and suckled her again; she'd put perfume on her breasts,
something I love.

After a while she pulled my head up again. "Are you ready?" she asked.

I was about to say something when she closed her eyes and tilted
her head to the side; I closed mine and we kissed. As I slid my arms around
her waist to hold her I felt the vibrator start; that pulse of pleasure
when it first turned on was incredible. It seemed there was another pulse
when it turned off. She played with the timing for a bit; we were both
moaning, she was rocking on top of me.

I couldn't hear the vibrator, but I felt it throughout my body as
it pulsed on and off. I felt her weight on top if me, her warmth. I could
feel the warmth of her breasts against my chest, feel her breasts moving as
we breathed, feel and hear the warmth of her breath on my cheek, hear our
moans. I had one hand at the base of her spine holding her to me, the other
up near her neck, feeling her skin and covered by her long hair. Every
caress of her hair as she moved, every pulse from the vibrator held between
us sent another shock of pleasure through me.

I pulled my mouth away from hers and panted in her ear "I can't
take much more."

In response she stuck her tongue in my ear and the vibrator stayed
on as she rocked against me more. I slipped back and she leaned forward. I
couldn't hold myself up anymore, I started coming inside her as I heard
that low wail start in her again.

I collapsed on my back; she rode me, moaning as I pulsed into her.
Finally she pulled the vibrator out of the way and leaned down on top of
me, kissing once again.

She slid off me and gave me a nipple for a while. I took a deep
breath and moaned as I sucked on her.

"I hoped you liked tits." she said as she held my head to her.

I flopped a hand up on her waist, she pulled back a little.

I looked at her. She had a wonderful satiated smile. I felt dazed
and undoubtedly looked it.

"Thank you for a great gadget." she said.

"You're welcome. Thanks for trying it out. I think I could get
better with practice."

She laughed and shook her head, her long hair coming down around
her face and into mine. My eyes closed and the world spun a bit more.

"There's just one problem with it." she said.

I forced my eyes open as she moved her hair out of my face. "I can
put it into a small enclosure, that's no problem."

She shook her head gently side to side, then moved back up giving
me a nipple. "No, that's not it. Why should I use that when I've got it's
inventor?" I held on and we rolled on our sides on the futon. A good
question indeed. I left one nipple and let my head rest on her chest. "Of
course this is only a prototype, we'll need a lot more testing." She
laughed and squeezed me. I closed my eyes to her warmth and softness, to
the feeling and sound of her heart.

We got up after a bit, both on wobbly legs. I laughed as I thought
over the last few days, thinking about that motor with the worn out
brushes, imagining the hours of ecstasy it took to get that way. I went to
the bathroom and posted my French letter. When I got back to the room she
was folding up the futon, on her knees on the floor, leaning over it. What
a marvelous bottom she has; firm and soft at the same time, such an
incredible cushion for making love. I got down behind her and pressed in.
She moaned and wiggled appreciatively, getting my interest up again
dramatically.

"Ready for another test already?" she asked, wiggling into me.

I put my hands on her shoulders and pulled a bit. "The price of
progress."

She laughed and tossed me another condom. I put it on and she
grabbed a pillow and the towel, putting them underneath her. I saw the
vibrator snake down again and she leaned forward a bit, spreading her legs.

What a beautiful sight; I felt her gently with one hand, sending
shivers down us both, then guided myself in. I slid against her, in heaven
again, the sight of her on the futon before me, her breasts squashed out a
little on her sides. I felt the warmth between her legs and the smooth
cushion of her ass. I thought I smelled her aroma mixed with her perfume
and inhaled sharply as I slid my hands up from her bottom to her shoulders,
feeling that soft black mane. I felt the vibrator start up its pulsing
again. It felt more distant this time; sitting against the base of my cock
had been intense.

"Mmmm... That's nice." I said. "Let me know when you're close to
the edge; I think I can last a while like this."

She moaned and wiggled underneath me. I leaned on her, feeling her
back and squeezing her shoulders, feeling her sensuous ass supporting me.
She changed the rhythm and I started sliding in and out of her trying to
match it. After a bit we got synchronized, then she started calling out
"Faster... Deeper..." I moved with her as best I could; I felt the vibrator
go on continuously and I pressed into her as she started her moan. I
pressed and wiggled, I was very close as well. Then as we moved it felt
like the vibrator touched my left nut; the shock set me off and I froze,
pushing and pulsing into her, then collapsing on top, covering my face with
her long hair.

It took us longer to recover this time. We pulled apart and lay in
each others arms, half on the futon, half off. I heard the mantle clock in
the other room strike ten. We both started moving.

"We should get to bed if we want to make the bus." I told her. "Or,
we could just say we're telecommuting tomorrow. It's Friday."

She kissed my chest and said "No, I've got meetings. But it's a
wonderful idea."

We kissed again standing up on our knees, then cleaned up and went
to bed. We agreed on setting the alarm earlier to give us time to shower
and get ready in the morning.

The alarm went off and I whacked it. I started to get up when she
pushed me on to my back and flipped the covers down. I started to say
something, then felt her hands on my cock. I lay back and enjoyed it. She
pulled my T-shirt off and knelt between my legs.

After I got hard between her hands she moved and I felt her breasts
on me, soft, then hard, then soft again. I started moaning and moving on
the bed. I must have said something, because she said "I'm not going to
stop, enjoy it." Then I felt a hand on my balls, and her soft hair between
her breasts. It was too much for me; I gave another moan and came, feeling
the warmth spread on my belly.

"Oh God, that was incredible." I panted.

She laughed and said "I've wanted to do that to someone for a long
time."

"Any time you want..." I laughed.

We wobbled to the bathroom and showered together. I knelt between
her legs and started kissing her. She moaned and held me to her for a
moment, then said "Stop... We'll miss the bus. We've got all weekend."

We managed to get to the bus on time. When we got on, together, a
bunch of the regulars whistled and applauded. I felt myself blushing. Emily
just smiled. We sat down and collapsed in each others' arms.

I was still half asleep when she kissed me and got off at her stop.
"See you tonight." she told me. I gave her a squeeze and a sigh.

I got off at the salt mines and walked in. The same gal that talked
to me a couple days earlier walked along side and said "Pretty subdued this
morning, have a long night?" I looked at her and smiled; I didn't know what
to say. She laughed and clapped me on the back. "Good for you! Good for you
both!"

We necked nonstop on the bus going home. She went to her place to
get some more things while I started dinner. She learned that night that
just because I'm neat doesn't mean I can cook; she told me she'd do the
cooking when we were together.

We worked on the gadget. We toyed with proportional control,
switching the motor between a low speed and a higher speed. This was pretty
wild work; We'd code a bit on my laptop, then download into the PIC, and
she'd lean back on the futon and try it. We'd get to the point where one or
both of us was too delirious and we'd make love again. We finally settled
on a low thrumming and full speed. Of course by then I don't think she
could focus or walk, but then again she didn't care.

Saturday afternoon she was laying on the futon, blissed out, the
vibrator thrumming between her legs, pulsing gently. She'd been like that
for a couple minutes. I couldn't take it anymore. I spread her legs gently;
she whimpered a bit, but I put a hand on the vibrator and held it in place.
She moaned and relaxed. I knelt down closer to her and slipped it inside
her to a gasp, then put my lips in its place. I could feel the heat; her
scent was delicious as her curly thatch tickled my nose and the warmth of
her thighs squeezed my head. She had one hand on my head and one on the
switch. I followed her timing as best as I could; she'd have us moving in
synch, then in a contra rhythm. She whimpered a little and I tugged a
little on the wire, pulling it taut. Her thighs sprang tighter around my
head and she started moaning and moving in earnest, going limp half an
eternity later. I pulled the vibrator out of her with a soft plop. On
impulse I put it to my lips and tasted it. It was warm and delicious.

That's how the weekend went until late Sunday; she needed to go
home to get ready for work. We agreed it had been the most intense
development work we'd ever done. And, the most satisfying.

The next two weeks had us sleeping over at one place or the other
most nights. She had a small apartment; I convinced her to bring her
laundry over and use my washer and drier rather than feed money into the
machines in her building. We squabbled about minor things, learning to live
with each other. I quit cooking save for breakfast on the weekends. I also
learned that she could eat much spicier food than I could, getting cleaned
out by her family Vindaloo recipe. I stayed home the next day,
"telecommuting" between the my little office and the bathroom.

We refined the gadget, packaging it up to make it portable.
Sometimes we used it when making love, sometimes we didn't. She got her
period and spent a couple evenings with me massaging her feet while she lay
back on the futon, blissed out to the thrumming between her legs. She also
gave me the most incredible blowjob I've ever had, combining her lips, her
breasts, and her hair, and told me that when her period was over, we were
getting rid of the condoms, she was back on the pill.

We love doing things together; I've really enjoyed going out again,
doing museums, parks, dining out. She lets me be in charge, lets me think
I'm in control. But I know all she has to do is get a nipple in my mouth,
wiggle her wonderful bottom up against me, or wave her soft perfumed hair
across my face, and I'm helpless. She loves to get me on my back, riding me
with or without our battery powered friend. The only thing I can do is hold
on.

And I know when she's helpless as well. She'll start out on the
futon with the vibrator between her legs, and after her head drops back,
I'll move up and slide a finger deep into her, hooking back to get that
magic spot while I move the vibrator around with my other hand. I know she
wants me inside her; I want her as well, and once she's at the edge I'll
take my finger out and enter her, taking her the rest of the way. Or, I'll
slide the vibrator into her and go down on her, feeling her wonderful
thighs holding my head and muffling her cries.

*

Another morning on the bus; I got on at my usual stop. Emily was in
the back, saving me a seat. I sat down next to her and gave her a kiss. "So
when are you going to move in with me?" I asked her once again, almost a
ritual greeting.

She smiled and said "How about next weekend?"

I gave her a big hug. "Oh, thank you." I hugged her and let my
hands roam over her body. My left hand came up with a wire sticking out of
her clothing. I leaned back and looked at it; a suspicious wire going to a
little switch with a light emitting diode. I looked at her and chuckled.

"You said you might not be going in today." She told me smugly. "I
didn't want to be bored on the bus."

I handed her the switch. We leaned our seats back. She took a slow
breath and tapped the switch gently. I couldn't hear it over the noise of
the bus, but I could see her eyes half close and a little shudder go
through her. She let her eyes close; I looked down at her hand. She was
gently holding the switch, not touching it. I could see the LED blinking on
and off. She hit the switch a couple of times setting a new rhythm. I
gently squeezed a breast, eliciting a moan and another shudder. As I leaned
over to kiss her, I put my hand on her mound and pressed gently, feeling
the pulsing vibration. I thought of how rewarding design work was when you
have a satisfied customer.

End of Story