...Is this a bad time to mention that some people kind of get off on it? *looks around*

LOL, not at all :) To each their own. It's just that it usually comes out of nowhere in these fics, and chomping down hard enough to draw blood, generally in the middle of their first time together?...Yeah, no thank you.

I like people who are creative, if they must have some sort of "special" way of demarking an "official" couple.