So, this is about a million years after the fact... but I just read this after angearia linked to it. AND! As luck would have it, I was just discussing this very topic--punishment of sexuality in Buffy--on Jezebel. So, there. But anyway. This post is awesome and thorough beyond all imagining.

I just wanted to add: Jonathan in Superstar. There are at least 2 women that it's implied he's sleeping with, that we can safely assume he wouldn't be were they allowed their full senses.