@ Emo:
You're on the right track here. The "wiring" you're talking about is a reference to hard-coded biological data. Even if we never isolate a gene that determines sexual preference, it's hard to refute the evidence that there is a biological constant at work regarding sexual preference. It is evident in all species that reproduce, and sexuality itself is dictated by chemicals in the body. It is biologically imperative for opposite sexes to be attracted to each other for purposes of reproduction and propagation of species. This is all obvious.
Now, when humans are developing, their sexuality is obviously not in [major] play until they reach a certain stage (puberty). This is probably because the developing person simply won't be able to "do anything about it anyway" so to speak. AKA, the body isn't ready for reproduction until then. But like you say, the "wiring", or more specifically the "biologically coded" instructions that exist in us all along are only then switched on. We are conceived with all the DNA we carry throughout our lives, but during development, certain genes come into play. It stands to reason that if a sex gene or sequence of genes do not do what they are supposed to do, then there will be a different outcome. This is evident in evolution itself, where it's obvious under observation the differences between biological entities where certain genes differ.
Even scientists don't fully understand the entirety of the genome, but we can draw some further reaching conclusions based on what we currently know. And currently, it's pretty obvious that homosexuality is a genetic thing. It's just not provable at the moment. But saying that homosexuality is a product solely of molestation, rape, or some other traumatic environmental occurrence is even less so. Especially considering all the gays out there who have lived perfectly normal "occurrence-free" lives.
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