I have a theory about this.mshcherbatskaya said:Completely irrelevant to the conversation, really, but every study I've seen on female sexuality in western cultures suggests that women are much more likely to be flexible in their orientation than men. Not sure why that is, but I think it's rather fascinating. But then of course, I would.
It's my belief that nearly every human being on the planet is, to some degree or another, bisexual. pure heterosexuality is the exception, not the norm. Our base state is low-grade bisexuality with a strong preference. In some people, the innate preference is reversed, or equal. It's what allows both genders to watch porn without getting grossed out by the presence of an actor of their own gender.
However, this outlook is malleable, and can be shaped by the environment in which the person is raised. There is no such thing as a completely sexually permissive culture. The closest we come is the West, and even here the general bias is that Straight is good, but Gay is only "tolerable".
Here's where it gets quirky, however, because Western culture has a double-standard. Male-male relationships are the subject of a degree of subtly negative ridicule. By associating "gay culture" with traditionally "feminine" pursuits such as clothes fashion, our culture creates the general impression that guy-gay is not manly. We perpetuate the "fairy" stereotype, with all its negative connotations. In short, men are encouraged to be straight.
Girl-gay, on the other hand, is romanticized. Even if we ignore all the porn for a second, there's still vastly more positive representation of girl-girl relationships out there, than of guy-guy. "The 'L' Word", "Buffy" are just the two examples I can pull off the top of my head, but can you name a single successful TV series (Besides "Will & Grace", and even that one's dodgy...) that perpetuates a positive portrayal of gay men? I bet you won't manage it without pretty extensive research...
If two guys make out at a party, they'll be shunned. People will do their best to ignore it, and will feel uncomfortable. Two girls making out, however, is an invitation for cheering frat boys to gather round, raise their beers and whoop loudly.
Result? Guys feel pressured into staying straight. The culture we grow up in constantly barrages us with the impression that having it off with another dude will undermine our social standing.
For girls, that pressure is massively reduced, to the point where some people just don't feel it. As such, the more natural human orientation - effective bisexuality with a strong preference towards the other gender - is expressed properly. Some may even feel encouraged, shifting their effective orientation closer to true bisexuality than it otherwise would have been.
So yeah, I agree that women are more likely to be flexible in their orientation than men, but my theory is that said flexibility is more a product of the social environment, rather than being the result of any real predisposition.