Homosexuality is a sin according to Leviticus, who also didn't like people mixing their cloth fibres amongst many blatantly stupid things that I bet NONE of you observe, because they're ridiculous.
BUT one must also accept that there was a much smaller population and less medicine to deal with STDs during the time of Christ (Personally, I think Jeebus would've been fine with homosexuals) and his flunkies, so it makes sense that someone would want to encourage breeding by telling everyone it was wrong, and discourage casual pleasure. However, we're in a new age and I personally believe we need to move on. We don't ~Need~ to populate, in fact, it would be better if we worked on reducing the population. We also live longer, lesbian couples can have children that are biologically theirs, gays can have surrogates and there's protections and medical support for many STIs.
But onto the topic at hand, Avan, you're wonderful. I agree that it is mostly chemical, many things can affect the chemicals in the brain so some is hereditary, but there's also plenty of environmental factors that could influence sexuality, food, weight, health, medications, etc. Hormones are variable, so it's understandable that if they affect sexuality then natural fluctuations would be expected especially during puberty. Then, as Loc pointed out, there's also the behavioural part. Naturally we want to avoid things that make us unhappy (Bad experiences with the opposite gender) and want things that make us feel good (Interactions with the same gender that may be more understanding, kinder, or just feel good) So it would make sense to want to be with whoever suits you better and what activates the pleasure centres in the brain and whatnot.
Being whateverthehellIam Trans/Pan? Bi? maybe, who knows. Could be from experience or hormonal or nothing at all. I've never been forced into the straight box by my parents, and I've been encouraged to do what makes me happy, and be myself. But I have always been squiffy and yes, before puberty I was exploring my sexuality, my childhood plushies were always gay males and often cross-dressed if that counts for anything, I spent most of my younger years with boys, playing with cars and actionmen. Then from 13 to 17 mainly spent time with girls, acting openly 'gay' with them, but I was always treated like a male, and related more with males (Not as a tomboy, more metrosexual, womanising sleazebag). Sexually, these days I lean more towards being fond of females but I personally can't tell if it's an emotional or sexual desire.
That being said, my personal views, based on sexuality being so fluid and rarely black and white, that I find it hard to say sexuality and gender exists at all outside of societal pressure. Yes, we've all got those things between our legs, but they don't have to determine who we are and what we like, and I don't intend on having mine choose for me. And I have to say, it feels natural, I'm not forcing myself to like males because I have the matching part, I'm going to go after what brings me the most happiness.
Some people juggle geese.