I will also don my flame retardant vest and venture a guess...

True or not, the preception is that most guys's fantasy is to watch two women, and be with 2 at the same time. Therefore, it is socaily acceptable. At the same time, most women at not "homophobic" so they do not have that skin crawling feeling when they see 2 women.

At the same time, most guys are very uncomfortable with the idea of gay men. I had a friend who was gay and very out of the closet about it. But when we were at Disney and there was a gay couple making out, he was just as repulsed as the rest of us. Not many women dream of watching two guys, and most guys don't want to see it, dotherefore it is not socaily acceptable.

Of course these are just generalizations and assupmtions on my part.