Rapex is a special type of condom designed to discourage and identify would-be rapists. The condom is worn inside a woman's vagina and is lined with an array of plastic "teeth" that cause the condom to attach to the rapist's penis.

The patented device was invented by Sonette Ehlers, a retired South African blood technician. She got the idea from a rape victim:

One young victim said to me, "If only I had teeth down there!" When I looked into her eyes, she looked dead, yet she wasn't.

The condoms are to be introduced in the South African market (their market entry has, however, been delayed) .

The Rapex FAQ can be viewed here, but doesn't specify whether a Rapex condom can also be worn in one's ass.