One of the lowest 'risk' groups is lesbians, and they're homosexual.
What this says to me is that if you have sex with a man, you're at risk. If you have sex with a lot of men, you have a lot of risk.

It's not homosexuals who are the problem, it's men.

Granted, if you only have sex with one man, and you're both negative, it doesn't matter who puts what where.