Well this is the best rated answer on yahoo
I know that I certainly do, for a variety of reasons:
1) It's kinky, and I guess I just find it hot. Something about two men together . . .
2) The men in gay porn are SO much more good-looking than in straight porn.
3) There's more options for types of men in gay porn; you can have muscled gym bunnies, attractive older men, young angelic twinks, college-age guys, larger, hairy older guys . . . lots more than what seems like the same guy in amateur striaght porn.
4) There's less misogyny in gay porn. I don't like porn where women are portrayed as "sluts", "whores", "ho's", "b*tches", etc.., and I don't like porn that only focuses on one person's pleasure (in straight porn, it's usually the male, with the woman not at all pleasured, or sloppily and ineptly done). In gay male porn, the partners are more or less equal, even as they assume top and bottom roles, and both sides get real pleasure and orgasm (you can't fake it like women in straight ponr can)!
I don't think a majority of women watch gay porn, but I know many do, and I think it's a growing niche.