Since this is a site catering more to black on white, I imagine the issue most females posting here will have, is that it is WHITE.
Sometimes people become interested in things simply because of their color ... I know I bought a car, once, because I loved the color of it.
I do not think your cock is small although based on previous commentary, your wife might want to fuck a car?
Your second question asks if your wife would get off better on BBC. Yes she would if her propensity to find black men exciting is awakened.