They prefer the taste of there own nails to other peoples?
Maybe it's like stress eating. No food at hand, so replace by nails on hand.
It's normally nervousness for me :/ so my nails are long XD
It's a habit usually caused by nervousness, but no one chews off ALL of the nail.
It's called stimming behavior.
Stress I believe, but I've never understood it. Eeewww.
It's delicious. Topped off with a lil hair? FORGET ABOUT IT!
Love the new avi!