Vagina dentata

A spiked Venetian chastity belt

Vagina dentata (Latin for 'toothed vagina') is a folk tale tradition in which a woman's vagina is said to contain teeth, with the associated implication that sexual intercourse might result in injury, emasculation, or castration for the man involved. The topic of vagina dentata may also cover a rare medical condition affecting the vagina, in which case it is more accurately termed a vaginal dermoid cyst.