What is wrong with free bisexuality, though? I mean, I'm firmly hetero and all
Apologies for singling you out, but I think you partly answered your own question with that disclaimer.
Even if you choose to view homosexuality as socially acceptable, don't you have a faint queasiness about it in the bottom of your gut, as if the concept goes against your grain? IMHO that queasiness is God's gentle prompting that it goes against his created order.
No queasiness, no gut 'anti' any more than I have a slight quasiness about tall people, or black people, or people with long hair. Unfortunately it's a sad fact about the internet that, if you say something like that without a bit of a disclaimer, there are certain people - bigots - who then try and twist it in some way to be used as an insult, and usually directed upon your sexuality. Also, I think it's vitally important to note my own sexual orientation here to show exactly the opposite of what you just said - it's contrary to my - for lack of a batter term - predeliction, but I have no objections to it.
EDIt; as someone else said, i do get a slight quesiness in anticipation of the contents of this thread, though. And a very large queasiness in you a) assuming that I have any compunctions about this subject and b) that if i did, it could be chalked up to 'God'. I find the concept of suspension of free will when it comes to bigotry and prejudice rather apalling, myself; 'a big boy did it and ran away' is about the same level of excuse.
but the only viable arguement I can think of against homosexuality is that it doesn't naturally bring itself to reproduction
That's basically it. God designed sex for both reproduction and pleasure, and he established certain guidelines and boundaries on how to use it. He disapproves of anything outside this boundary, including extramarital sex, homosexual sex, and (by extrapolation from biology) pedophile sex.
There are other, less direct, arguments too. If a person decides to view a certain sin as acceptable in his own eyes, he sets himself up with a mindset that is in opposition to God. Such a mindset, over time, is likely to lead to approving other sins, even ones which may have nothing to do with the original one.
(Note that, from God's point of view, homosexuality and pedophilia are defined solely in terms of sex. Firm friendship with a person of the same sex is not homosexuality. Neither is firm friendship with a child pedophilia.)
That's from the spiritual point of view. From the physical point of view, there are studies that show the ideal environment for raising a child is one with both a strong male influence and a strong female influence. Other environments, such as single-parent homes, may be sufficient, but they are not ideal. Likewise, a child raised by two fathers or two mothers does not get the benefit of that ideal environment. It may be the case that it does no harm at all, but it is not ideal. (NB: Such an environment may have nothing to do with homosexuality, such as a child raised by a single father and an uncle who acts as a father figure.) It may also be the case that a child raised by two fathers or two mothers will be better off than a child raised in a foster home, but again, it is not the ideal.
Well, and I'm going to be blunt, the spiritual POv can **** right off when it comes to society as a whole. You can't dictate to people what to do on the basis of a 2000 year old story, it's just not fair. If Christians want to treat other Christians like **** based on a guess of a dusty old translation, then that's their choice, but it's simply dictat to do it to anyone else.
If it emerges that
scientifically there is some disadvantage to same sex parents (and more than single parents or being a plain old orphan), then you can perhaps have an arguement on those grounds (but only with regards to adoption or fostering, as you can't remove someones choice to reproduce biologically), but as you already noted that's not an arguement against sexual orientation in any case, and certainly homosexuality doesn't really prevent a different-sex parental 'community', if we consider the historical evolution of society (both in ancient and modern societies, parental responsibilities and roles extend to cover a larger community rather than just 2 individuals).
It's worth reaffirming, though, that homosexuality isn't really a barrier to reproduction, because if it was we almost certainly wouldn't have any gay people; even if there is not a genetic cause, then any cultural cause would be unlikely to propagate if the people creating it died quickly. Hell, Bonobo monkeys seem to get along fine. And bisexuality, of course, is absolutely fine from this standpoint.