Another reason o the Gay bias against bisexuality is this:
A majority of gay men, today, due to social pressures, tried to live straight lives and deny their deeper feelings, only to pass thru a period where they increasingly experimented with homosexual activities before committing themselves fully to a gay identity and gay lifestyle.
As a result, they tend to view all other men engaging occasionally in homosexuality as being like them, and being simply on the arc to fully realizing their gay preferences.
One of the hardest things for people, in general, to do is to understand that other people do not see or respond to the world the same way they do, for the same reasons.
In any event... the evidence has already been collected, from both history, surveys, and modern scientific experiments that do not rely on reportage but use a device for measuring actual arousal when exposed to different kinds of porn...
Sorry all you folks who think otherwise... but proof is proof and unsupported opinion is just belief.
In fact... all evidence shows that human males run a spectrum from fully homosexual, thru bisexuality of different degrees, all the way to fully heterosexual.
Approximately 8% of males are totally homosexual, approximately 12 percent of males are totally heterosexual, with the other 80% distributed on a curve that is biased toward the more heterosexual side.
the majority of human males Prefer relationship and sex with females... but are more than capable of enjoying sex with males as an occasional diversion, or when females are not available.
But all real evidence agrees...
Human males are predominantly hetero-preferring bisexual.
It is real... and it Seldom results in a man continuing on toward being fully gay.
It does not matter what people claim. The first thing you learn in anthropology is that people lie both to and about themselves...and about their cultures, too.
What matters is what they DO.
Anonymous polls get more truth than attributed ones... and a plesmograph will tell you for certain whether a man finds homosexual imagery arousing.
Bisexuality in human males is real.