http://www.sciencedaily.com/releases/2008/06/080628205430.htm

« Homosexual behaviour is largely shaped by genetics and random environmental factors, according to findings from the world's largest study of twins.»

...

«"This study puts cold water on any concerns that we are looking for a single 'gay gene' or a single environmental variable which could be used to 'select out' homosexuality - the factors which influence sexual orientation are complex. And we are not simply talking about homosexuality here - heterosexual behaviour is also influenced by a mixture of genetic and environmental
factors.»

...

«Rahman explains: "Overall, genetics accounted for around 35 per cent of the differences between men in homosexual behaviour and other individual-specific environmental factors (that is, not societal attitudes, family or parenting which are shared by twins) accounted for around 64 per cent. In other words, men become gay or straight because of different developmental pathways, not just one pathway." For women, genetics explained roughly 18 per cent of the variation in same-sex behaviour, non-shared environment roughly 64 per cent and
shared factors, or the family environment, explained 16 per cent. The
study shows that genetic influences are important but modest, and that non-shared environmental factors, which may include factors operating during foetal development, dominate. Importantly, heredity had roughly the same influence as shared environmental factors in women, whereas the latter had no impact on sexual behaviour in men.»

So interesting. That's basically what i wanted to say in the end of my essay on homosexuality. I don't think we'll ever find the exact explanation because in reality there's none. We can't study everything abiut feelings and emotions and traumas and what makes us tick or not. Our options in sex are never really settled. Something can happen and next thing you know, you feel an attraction that you thought you would never feel before.

And never underestimate the power of homophobia in our sexuality.