Bi-sexuals are not well liked in the gay-community.
Few Middle Americans, for example, understand the hatred and prejudice that exists between many blacks and Latinos - despite the "we're fellow minorities and victims" routine that their respective "community leaders" sell to the public.
Likewise, lesbians and sodomites don't get along with one another - they're essentially separate tribes with very different "styles". They form a political coalition, but they rarely socialize with one another because neither has anything to offer the other.
Bi-sexuals are particularly hated by both sides, although they are, again, officially tolerated.
Many times in college I saw an attractive, normal-looking girl get briefly "involved" with your typical heavyset, leatherclad diesel dyke for a few months (all the while dating men simultaneously) only to throw her over for a good-looking guy.
I particularly remember one case of a very hurt dyke whose "girlfriend" was continuously "cheating" on her with men. She even said, at one point, "what do they have that I don't?", at which point I couldn't help bursting out into uncontrollable laughter.