Betcha didn’t know that Greek philosopher Aristotle advised women to use various oils—cedar, olive, lead, or frankincense—to kill off any invading Greek sperm. On second thought, there’s a chance you don’t even know who Aristotle was.
Indian women of antiquity would attempt to stave off impregnation by using rock salt that had been soaked in oil. Byzantine physician Aëtius of Amida advised ladies to reach in deep and smear their cervices with a poultice made of cedar rosin, alum, wine, and even lead. He counseled men to cover their ding-dongs in vinegar, gallnut, alum, and pomegranate.