http://www.orthodoxytoday.org/articles2/PragerHomosexuality.php
... Judaism may be said to have invented the notion of homosexuality, for in the ancient world sexuality was not divided between heterosexuality and homosexuality. That division was the Bible’s doing. Before the Bible, the world divided sexuality between penetrator (active partner) and penetrated (passive partner)...
...Judaism changed all this. It rendered the “gender of the object” very “morally problematic”; it declared that no one is “interchangeable” sexually. And as a result, it ensured that sex would in fact be “fundamentally interaction” and not simply “a doing of something to someone”...
“... Judaism may be said to have invented the notion of homosexuality, for in the ancient world sexuality was not divided between heterosexuality and homosexuality...Judaism changed all this...”
Ummm....I think most mammals already knew there were two sexes. To this day, I’ve never heard of a stallion penetrating another stallion, or a male lion taking it up the rump.
Natural law.