I know she admires him and has always had a curiosity as to the size and function of a black dick so I think out would fascinate her.

Aint' no different than any other dick.
They come in all shapes, sizes and colors.
Some work ,some dont,some make woman scream Helllllllllllllllll no that AINT going in here , some make woman point and chuckle and some are just right.
Just because it is black doesnt mean it is a super cock... just means it is black.

We think Lost summed it up perfectly so we'll just say... ditto!

welcome to forums. It has nothing to do with the fact that he is a black guy...its the idea of her walking in and there is some guy she does not know invading her privacy...some women get quite upset over this and see it as a violation vs. pleasure. To lots of people...fantasy is lots of fun. But bringing fantasy into reality unvoluntarily can be a bad thing.

Welcome to the forums FW. :)

You should discuss this with your wife---surprises having to do with other sex partners can backfire.

NEVER "set it up where it was unexpected." Nothing could be more disrespectful to your wife than to set something up without discussing it in advance with her to be sure she wants to do it and to make sure it's HER decicision.

Wives are not possessions to do with what you please. Remember, what you are considering is supposed to be for HER pleasure, and if it would not please her, you are asking for big trouble aside from showing your disrespect.

Jim