Historian Albrecht Classen got so tired of hearing people blithlely assert that chastity belts were ever a thing that he wrote The Medieval Chastity Belt: A Myth-Making Process , explaining how a 15th century hoax that appeared in a manuscript that also feature fart jokes and devices for making people invisible became canon. Read the rest
More:
Chastity belts were a joke, then a metaphor, then a hoax