What do you mean by unnatural?
Oh boy...
As I said before, even one example of dude on dude animal action makes the notion of homosexuality natural, unless you can explain how those animals are behaving "unnaturally." Monkey original sin.
His view is so confused I can't sort it out.
First, I don't think he has a clear conception of how to distinguish "natural" from "unnatural." THat's why I tried to get him to explain this via the Christian myth of original sin. "Unnatural" acts are acts preformed by man, using free will, contrary to God's commandments. Natural, then, is acting in accordance with God's will. Unnatural is acting in sin.
That's how I've heard Christians explain it. Snake Tongue lacks even that level of perspicacity.
Second, Snake Tongue seems to have confused "natural" with "good." This would make some sense under the traditional Christian understanding of sin, but again, Snake Tongue doesn't seem to be arguing that (to the extent I can even interpret his rambling screeds).
But, of course, there's no connection between "nature" and "morality" for most of the posters here. As was said earlier, murder, theft, rape, are all rampant in the natural world. Just because a grizzly bear will murder a cub to eliminate competition, that doesn't mean human actions are bound by that evolutionary cruelty.
And then, above all of this, is the simple fact of "who give a ******" Whether natural or unnantural, genetic or tought, happy or sad, humans get to touch the genitals of any other human willing and capable of giving consent. It's a moot argument and should only hold interest in so far as it contributes to knowledge of genetics in general.