Anonymous

The chute for what all goes into the body has always got to be kept moist from saliva and other things.

Anonymous

Because there's liquid in your mouth where the gums are, so they need to be waterproof, just like our internal organs.

Anonymous

Gums have different properties, but believe you me, they are skin, as is the stomach.

Anonymous

Well, gums aren't skin, so they wouldn't behave like skin, would they?