Actually, I do, Proverbs 26:11 was an example I gave. Using animals to picture character traits in a proverb is very different from using them to prove what behaviors are natural. Again, they are not using them in proverb or parable form to paint an easily understood picture. They are using very specific behaviors and saying it is natural to copy those same behaviors. Force them to be consistent in that view.
You seem to be on something here, but I want to be sure. When you say "they", do you mean defenders of homosexuality? I'm trying to find the context in which you make your statement.