Oh I forgot! I had some dental work just after you posted this, and they used a dam for the first time ever. It was on a back tooth, and I didn't have trouble breathing or swallowing, but then there was a period of time in the middle, when they removed the frame and left to do whatever mystical thing dentists do in the back room, and that part was pretty uncomfortable, with it hanging out of my mouth like I'd been trying to eat a deflated balloon. Anyway, all I could think was, I cannot believe this; I have got to tell ratcreature.