Actually it is rampant.
I don't know if I've ever met a black guy I didn't suspect was at least bi-sexual.
PS: I've been predicting this sort of thing for going on decades now: Little boys who grow up without fathers imitate the only adults they know, which are women. Hence they grow up to behave sexually like women, i.e. they grow up to be homosexuals.
You're kidding, right?