What scientific studies? Show me those studies.

I've worked around black women that I could hear talking about penis size and many do think white guys tend to be smaller. Before I developed a bulge from PE, several times I overheard black chicks guessing my penis size when I walked into a fast food joint or somewhere else and each time they said "small one" or "5 inches". One said "He won't have enough, it would be like a small banana." So it's not just a "they are so tired of hearing it" thing. Some are of course, but there are always some people tired of any subject. I imagine it's most difficult on black guys who are not hung, since they know the expectation. But it's not just someone like me posting, it's many black women (and white women) are actually expecting, and they have much more of an effect than I could ever have on this.