Being gay is a fetish.

[abaris]

It's because masculinity culture tells men that they can't be faggots because that's anti-male and things like homosexual intercourse and relationships are considered feminine - Since our culture dislikes men with feminine traits it is considered bad for a male to be gay. Lesbians are a different issue for male homophobes because lesbian sex can be considered hot and it's frequently emphasized on mainstream pornography because it sells (and in some ways it creates stereotypes about Lesbian relationships but that's another issue)

It runs deeper. It may be a cultivated remnant from our stone age ancestry where procreating for the survival of the tribe was the foremost necessity. I can imagine that homophobia has it's origins there. But just as with everything else from the stone- or bronze age, we should be above such lines of thought by now. Well, bigotry tells us differently.