Sick. But it's true. Bisexuality is obviously a choice. Sodomites seem to forget that.
Bisexuals are included for political purposes in the LGBT pretend alliance. They’re the “B” part. Aside from that, though, everyone basically pretends they don’t exist. If called on it gays’d say they’re “born that way.” But it’s entirely too confusing to simultaneously claim you can only be born gay or straight, oh yeah, unless you’re both.
Something similar occurs with trannies, who are grouped with the rest even though they may be perfectly straight. It seems all it takes is for them to be considered abnormal and for the abnormality somehow to relate to sex organs. Otherwise they have no common interests. Heck, even lesbians and male homosexuals generally hate eachother, which is a well known fact.