I think EVERYONE is a bisexual in one degree or another. Not really buying the 100% gay or %100 hetero thing. It's just stupid. It's human nature (not the same as having a gender, you have one and deal with it).
I'll quote my excentric muse:
Björk: "I think everyone's bisexual to some degree or another; it's just a question of whether or not you choose to recognize it and embrace it. Personally, I think choosing between men and women is like choosing between cake and ice cream. You'd be daft not to try both when there are so many different flavours."