If you've ever wondered where these words came from, well, there were two real people knowns as Donatien Alphonse Francois, Marquis de Sade and Leopold von Sacher-Masoch. Their sexual conduct so shocked the world that they got their own name.
Sade was well known for his libertine sexuality. He was accused of a number of sexual crimes like imprisoning a prostitute and poisoning another one. He would even write erotic works describing his practices.
Leopold von Sacher-Masoch was a writer renowned for his romantic stories of Galician life. He had a thing for dominating women in furs. In fact, he entered a contract with a women to become her slave for 6 months, with the stipulation that she wear furs as often as possible, especially when she was in a cruel mood.
If you want to learn more about these men and their lives, check out the source!