A word to the (already) wise... don't let it break the skin, because the human bite is one of the most toxic in the animal kingdom. Not poisonous, toxic, that is seriously unclean and carrying infection. Sorry to put that disturbing tint to your make-out sessions... just don't get too bitey, is what I'm saying.
OT, I haven't bitten since I was really young. Even as a kid I didn't do it... that would require getting physically close to another person!