Chastity Belt MP4: A chastity belt is a medieval-style, belt-like device, often made of metal, that covers the genitals and is designed to prevent sexual intercourse. While commonly believed to be a medieval invention to ensure a partner's fidelity, there is little credible evidence that they were widely used during the Middle Ages. Many surviving examples are now known to be from the 19th century and were likely created as historical curiosities or for sexual fetish purposes. Learn all about Chastity Belts by watching this MP4.