Found the article again on CNN, and it goes a little bit more in depth. Basically this is to help CATCH rapists rather than prevent rape, as the men MUST go to a doctor to have it removed.

South Africa has one of the highest rape rates in the world, Human Rights Watch says on its website. A 2009 report by the nation's Medical Research Council found that 28 percent of men surveyed had raped a woman or girl, with one in 20 saying they had raped in the past year, according to Human Rights Watch.

In most African countries, rape convictions are not common. Affected women don't get immediate access to medical care, and DNA tests to provide evidence are unaffordable.

"Women and girls who experience these violations are denied justice, factors that contribute to the normalization of rape and violence in South African society," Human Rights Watch says.

Women take drastic measures to prevent rape in South Africa, Ehlers said, with some wearing extra tight biker shorts and others inserting razor blades wrapped in sponges in their private parts.

Critics have accused her of developing a medieval device to fight rape.

"Yes, my device may be a medieval, but it's for a medieval deed that has been around for decades," she said. "I believe something's got to be done ... and this will make some men rethink before they assault a woman."