Okay, "Fangs" is because I always remember, especially when I am dreaming, that my true state--if everything is stripped away--features four ugly, pointy fangs in the middle of my mouth.
I have three crowns and one veneer included in my smile. Of these four falsies, only one has never popped off to expose the fang lying beneath. Okay, that's not accurate. Two of my crowns haven't popped off, but one of those is a replacement for a veneer that popped off 3 times in one year (yikes).
Whenever I imagine myself in a survival scenario, like being stuck on the island in Lost, the thing that always chills me to my bones is that my tooth could pop off, and I would spend the rest of my days looking scarier than Jaws.