Besides the U.S. code, nature itself, and the ultimate source for the U.S. Constitution?
You cited natural law, not US law. US law is irrelevant to natural law. The US Constitution is sourced primarily from the minds of the Founding Fathers. If you cite nature as its ultimate source, than nature is also the ultimate source for ALL law codes throughout history.
In my studies, the apparent condemnation of homosexuality in ancient cultures is talking about "unmanliness". Consider the Old Norse word "ergi". This word meant "unmanly" and was basically the single worst thing you could have called someone.Show the evidence of that.
However, there is actually no evidence that I could find that this was in reference to homosexuality. Instead, it referred to actions that are generally associated with women being partaken in by men (a common example cited is the Shamanic practice of seithr, which would be regarded as ergi if a man practiced it, since it's primarily associated with women).
Meanwhile, consider that in ancient Greece, there was at least one army that based its system of troop morale around homosexual pairings between its members.
It's not off topic.You really don't carry a consistent point there. Generally had, besides if they were, so what? Then a segway into something totally off the topic.
I'm saying that even if ancient cultures have generally been against homosexuality, that does not mean it's actually a bad thing in itself, or "unnatural."
A village is descended from many individuals, not from a single man/woman pairing. If you're talking about Adam and Eve, there's no evidence that they ever existed.And they all stem from one man and one woman.
Not unto their own devices they can't.
Straights can reproduce with surrogates if they're infertile. But if they were healthy and fertile as a couple they could reproduce naturally.
That's the point. Homosexuals can't reproduce as a couple to themselves. That's also a part of natural law.
You've still not shown that law.