I think it's fairly clear that the collected biblical teaching (OT and NT) is that homosexuality is wrong, if you're working from the simplest way of reading it. It doesn't explain why, but it makes no bones about it being unacceptable to God.
I've tried to work with revisionist interpretations for a number of years now, to try and reconcile lots of things, but they just don't convince me at all. The way I'm dealing with it now is having a simple choice between a straight-forward, literalist reading which would mean that, according to Romans, who I am instinctively sexually attracted to means that I am part of what God has punished the culture with or a completely different approach to scripture which would be more in line with it containing God's word, than being God's word in its entirety.
This is an enormous deal to me, and I'm finding it very difficult, if truth be told. Because before, I've always been quite happy to accept that if I don't get something in scripture, I keep looking until I do. But the scriptural teaching about homosexuality boggles me, because I honestly can't see anything wrong with falling in love with someone who has the same bits as you.
The 'natural' thing is a complete crock of bananas - I've been 'naturally' attracted to girls as well as boys for as long as I can remember, I didn't train for it, it just always was.
The 'not able to procreate' thing is also gubbins - I have heterosexual married friends who have been unable to conceive because the wife was born without a womb, should she never have got married because of that?
The main instance of homosexual behaviour in scripture that is used to underline the sinfulness of it (Sodom) is an attempted gang-rape, which, quite frankly, is a deeply offensive comparison to make when we're talking about the loving committed relationships that many in the gay community are privelieged to enjoy freely in our culture.
So, I'm looking at how homosexuality would break the golden rule, and the only reason I can see in the scripture is that God doesn't like it.
Which used to be enough for me, but elsewhere God is presented as a God who is rational and completely good, not a capricious God who vindictively outlaws things 'just because'.
I'm still working it through, but I think it's a straight choice for me now, between the fundamentalism I have clung to like a life-raft before now, and actual theological liberalism.