White women don’t sleep with white gay men when they find out they’re gay. Black women wouldn’t sleep with black men when they find out they’re gay. The difference is, the white gay guys let everyone know, and the black guys don’t.
Or it could be a matter of white gays not sleeping with women and the black gays doing both halves of the population - back to the promiscuity link.
Not from what I've seen. I've known a couple out gay/bi guys that didn't seem to have any trouble finding women. There are some girls out there that seem to like them.