FairShake said:Essentially once a man has sex with another man he isn't seen as "masculine" anymore. And homosexuality is pretty much the very definition of unmasculine for many people out there. Bisexuality confuses the issue for people so in lieu of a changing definition of masculinity (which is coming...) there will be no bisexuality.
Good answer. Once a guy says he's "bi" he's seen as a fruitcake. A woman doesn't get the stigma of being "gay" if she's bi as she is feminine to begin with. (Unless she's a bull dyke).