Yeah, my high school was a little bit like that- at least, there were a lot more bi girls and gay boys than gay girls and bi boys. (And everyone slept with everyone else, but that's par for the course in high school.) I think the only two lesbians I knew were the one lady gym teacher and my psycho ex-girlfriend.

Whose ex-boyfriend was the school's solitary bisexual boy. And is now engaged to her, since she has apparently become religious and decided to return to a "heterosexual lifestyle."

(See? Crazy!)