Ouch. Stop. Stabbing me with your chin.
Have you ever met the angry kisser? I have. He used to attack me. I'm not sure if he was so afraid of rejection that his method of attempting to kiss me was to do it machine gun style, but whatever the reason, it was a scary thing. I tended to dodge. I dodged once and nearly got a black eye, however. Note: This is far worse if the dude has sharp, pointy facial hair.