Popcorn

I think its utterly unrealistic/unbelievable to think that sexuality is not 'pre-determined'.

Really?

I am sure that I've read something somewhere that says sexuality can shift depending on your environment - ie all male/female environments will make you more likely to switch while you're in them.

My gut feeling would be that it is more likely to be a range of factors, on the basis that if it was simple the issue would have been laid to rest a while ago.... but that's exactly scientific.

Interesting wiki tho.