Screws in gums - The most annoying thing is when the corners of your mouth get caught by screws every time you smile. It's good for making friends laugh.
Eating noodles - it's good because it feels good when you gargle with real wires that get stuck.
Wounds in the mouth - it hurts because there are small scratches. Especially on the molars,
but it's good because it's been corrected nicely haha.