Missing out on the best parts... legs, ass, and everthing inbetween...
All true. I suspect it was more acceptable among men in ancient times than among women... and it's just that that pendulum has swung... and will probably swing back someday.But I basically believe everyone is basically bi, otherwise cultures like the ancient Greek could not have been established.
As for the male bi crowd: For some reason admitting to being bi brings worse prejudice/disapproval to men than it does to women, at least in our culture. So I don´t think every man who is bi will walk around and proclaim it.