Oh yes, its definitely more complex than gay/straight... a lot of it, for me, is in the values I learned from my parents- since I was taught to respect everyone and their beliefs equally, I was perhaps more inclined to explore other sexualitites without the self-loathing that many gay men experience.

Thats not to say I 'chose' to be gay- I've been attracted to men for as long as I can remember- but occasionally (very occasionally) when I find myself attracted to a girl, I dont freak out that I'm not 'gay' any more- I'm just me.