Yeah it's a choice. I'm pansexual/bisexual and I'm definitely the one making the choice... I mean being straight is a choice too. I was 100% heterosexual the first 18 years of my life (no physical contact I mean), but then I realized, hey, gay's ok too! I feel like my own sexuality, and most other's, is rather fluid. I mean yeah people have different affinities for different orientations, but at the end of the day I believe in will. If I had to adapt my sexuality for self-preservation, I most certainly could.