More About Vagina Dentata
The notion of a toothed vagina has reappeared in many cultures throughout history and has been attributed to a number of different meanings. These include the notion that the female body is scary, to represent a sense of "castration anxiety" arising from a generalized fear of women, or that the stories are designed to suppress female sexuality.
It's also interesting to note that female condoms with teeth have been used as a form of protection against sexual assault in India. Also interesting: there are a few reported cases of very rare vaginal cysts resembling teeth growing inside a vagina.