I'm starting to think that everyone is at least a little bit bisexual, and there are no truly gay or straight people. Do you think that's true? Or is it because i am a little bit bi that it seems that way for me?
I think so. Most females clearly are, and will probably openly admit it. I think most males are too, but most straight males will never admit it (at least not for another decade or so as our society continues to become more gender-neutral and more open about sex).
It also explains so much, for example how identical twins sometimes grow up to be different sexually, also it would explain bi-curiousness during puberty, how some people change from straight to gay later on in life, how there are different rates of homosexuality in different cultures, etc. These things can be explained with the "everybody is at least slightly bisexual" theory, but not with the "most people are one or the other from birth" theory.