Tongues are disgusting. Stand in front of the mirror and check yours out. See the wildly different shapes you can make it assume. It's just… Ugh! It's not right. Also there are teeth; little chunks of calcified matter embedded in soft flesh around the jaw. The digestive tract starts off horrifying and only gets worse as you progress. So much for the theory of a benevolent creator. (I'm not stoned, I was born like this.)