There is NO WAY that we've had it wrong for six thousand years.
Sexual relations exist for reproduction, all pleasure derived from sex is secondary. As there can be no reproduction from homosexual activities, it can only follow that God didn't intend for them. Despite the lefts wishes to the contrary, humans are the only creatures that engage is such unnatural acts and that is because we alone have free will and use it to defy God.
Not exactly true. Many animal species will hump their same-sex companions under stressful circumstances -- dogs, cows (I've even seen cats hump objects or humans), or even collectively as a variety of biological adaptation, like the bonobo monkeys. But it is because humans have the total package -- opposable thumbs, dominion over animals, technology, literature, folklore, libraries, virtual communications -- that such disgraceful inventions as "gay marriage" and "gay parenting" can take place. We are the ones who have eaten from the tree of knowlege.