Discreet, your arguments so far in this thread have been extremely fallacious, and too many of them are commonly held amongst the anti-gay camp. I'll tackle them in the order that I can remember them, but if I miss any feel free to remind me.
Firstly, your comparison to bestiality: this is a very basic one. There is no valid comparison because of the matter of consent - disgust is not, and never should be, the litmus test for law or morality. Animals, minors, rape victims, toasters, and so on are unable to give consent and so cannot legally be involved in either sex or marriage. I don't agree with arbitrary morality: I think that there should always be precedents used, and for this issue consent is that benchmark. This applies especially to whether the law should be involved, as legality and morality are not necessarily the same thing. You can hold whatever views you wish, but that does not mean they should be made into law.
Then there's your complaint about Darwinism. This I disagree with because it presumes to know the will of nature, almost as arrogant an idea as believing to know the mind of God. We can study evolution for a further hundred years and chart species progressing through the fossil record as much as we like, but I doubt we will ever truly understand all the subtleties of human genetics.
There are studies showing that when you increase the population density of a mouse enclosure that the incidence of homosexuality increases (and anyone who's seen Jurassic Park knows about the frogs that change sex in a similar manner). This could suggest some sort of population control or 'worker ant' failsafe; worker ants being the ants that contribute to their society while not actually passing on their own genes in most cases. Of course, I'm merely conjecturing here but my point is that you can't make the "it's anti-Darwin" case like you are trying to. The inability to pass on genes is a poor reason for sex to be disallowed - do you believe that the infertile, the menopausal and the elderly shouldn't be allowed to have sex, or that it should be disapproved of?
I feel no need to address your post about the threatened suspension of anti-gay t-shirt wearers because it is clearly a different matter from the question of whether homosexuality is moral or not. Issues of free speech are separate, and your news article is a bit of a red herring, so to speak. Similarly I am not going to read the articles you posted until you explain why you have cited them. Posting random sources with no explanation in your own words does not a credible argument make.
I'm sure I've missed a couple of your arguments, but I've run out of time to write more, so remind me of them and I'll reply again.
Oh, and hello everyone!