Is being gay a sin?

So i'm sat here watching BBC news, yeah i know i'm bored. Anyway there doing report on the fact that California has become the second US state to legalise gay marrige. Apparentaly protesters are all there saying its a sin and crap, but is it?

I personally don't have a problem with gay people, being bi myself its obvious i wouldn't. I hate it when people say 'God hates all the homosexual' It reminds me of a quote. 'If god didn't want men to be gay, then why did he put pleasure spots up the ass' and in a way its right. If people wern't supposed to be gay, then why is it possible to have gay sex?

I'm not a christian, and i in no way belive in god, for reasons im not gonna say or i'll get hated on. But men have prostates, meaning that gay sex is possible. I'm no doctor, so i don't know exactly what else the prostate is for, if anything. But if it does that then, well i don't know.

One person said "You don't see gay people going round saying 'eww, stright people'" which is the truth, you don't. So why do people have to be so homophobic, i have seen so many people at my school that slate gay people. But it dosn't happen as much as it used to, now that one of the most popular boys appears to be gay. I mean he's not admitting it, but making it so bltantly obvious that everyone knows.

So this journal kinda has two purposes i suppose. But i just felt like posting this, because the BBC report made me think.