I had a roommate my freshman year who started doing meth after we had lived together for a few months. To this day, I still have nightmares about the sound of her grinding her back teeth constantly while she slept. I didn't know what the sound was for awhile, but it would keep me up at night and drive me absolutely insane. Once I actually figured out what the noise was, I got sick to my stomach and had to resort to wearing earplugs every night. I don't know how the girl had any teeth left in her mouth with the way she was grinding, but who knows...they may be all gone by now.
