Trylakos said:http://en.wikipedia.org/wiki/Vagina_dentata
Do you think that if a toothed vagina existed, do you think people would try to bite tinfoil for pleasure? Although it hurts on the teeth in the mouth, some people may have masochistic tendencies, overcoming and feeling the possible sensation in all the nerves down below.
The vagina dentata appears in the myths of several cultures, most notably in several North American Indian tribes. Erich Neumann relays one such myth in which A meat-eating fish inhabits the vagina of the Terrible Mother; the hero is the man who overcomes the Terrible Mother, breaks the teeth out of her vagina, and so makes her into a woman.
Rofl