I'm already back!
It's just because the ever-insightful carrie721 posted.
I find the universe all the more remarkable at the thought that it's all a natural process! It seems more remarkable than thinking it was all created with a bit of magic, at least to me anyway...
(In case you want to know, I personally think the universe is a physical manifestation of an underlying piece of grand mathematics. Of course, I study particle physics, so in a way that shouldn't surprise anyone. Also, my philosophy of mathematics is Platonic. The best evidence I can think of to justify that philosophy is the magic of complex numbers, which, by the simple positing of i^2 = -1, reveals a whole lot of unexpected relationships, particularly e^ix = cosx + isinx.
)
As for the roots of homosexuality, it's best described as a type of biological "misfire". As far as I can tell, this "misfire" and that of fetishes are related (i.e. the origins should be related, even though the desires can easily be independent). I myself have a latex fetish.
(And, no, I'm not into forms of dom/sub, or much of anything beyond wearing latex. I'm rather boring in that way!
)
Ultimately these issues all come down to genes, although sometimes (perhaps with this instance, for example) that can be as helpful as saying that we're made of fundamental particles - certainly, that's where the answer lies, but it does nothing to help our brains understand the problem!