maybe all of them BEEN bi, they just thought it was an abnormal feeling so they try to hide it at first.
As for the females being gay then turning straight as an arrow?? How do you know for sure she has become straight as an arrow?? Maybe she has just gotten married or has finally put herself in a COMMITED relationship.
i consider myself open minded, but I've never been sexually turned on by a man's ass, or the idea of a man giving me head. I've seen some bi-porn too and I don't get turned on by seeing dudes fuck other dudes.
you have to think of it on a scale
let's say 1 to 10
with 10 being a guy enjoying buttsex with another man
and 1 being admiring a guy for a nice well built physique
watching WWF or E whatever a very lot would make you a 5