[Happy Monkey]

Actually, what animals do is a yardstick of what is or isn't natural. But everything that is natural isn't necessarily moral or ethical. Humans have a higher capability for empathy, so we modify our behavior based on how it will effect others.

And that's the crux. The natural behaviors that human societies discourage should be the ones that produce some objective harm. If there is no real argument against a behavior, then it shouldn't be prohibited. The "gay animals" issue isn't an argument for gay people, it is a refutation of an argument against gay people. Gay people shouldn't have to make an argument defending their behavior at all.