Back in the middle Ages the fighting Knights who departed for the Crusades were credited for inventing the Chastity Belt. In fact the mention of the belt does not appear until the fifteenth century.
It was thought that the invention of the Chastity Belt was a method for jealous husbands to keep their wives faithful in their absence. Suspicious husbands used chastity belts to prevent their wives from engaging in sexual relations (or masturbating) in their absence.
But it seems that women also used them to protect themselves from rape. What an uncomfortable thought…