This article is about sadism and masochism as aspects of BDSM.

The term Sadism passed into common usage as the sexual or social pleasure or gratification in the infliction of pain and suffering upon another person. The word is derived from the name of the Marquis de Sade, a prolific French philosopher-writer of sexually violent novels and plays. The passive counterpart of sadism is masochism, the sexual pleasure or gratification of having pain or suffering inflicted upon the self, often consisting of sexual fantasies or urges for being beaten, humiliated, bound, tortured, or otherwise made to suffer, either as an enhancement to or a substitute for sexual pleasure. The name is derived from the name of the 19th century author Leopold von Sacher-Masoch, known for his novel Venus in Furs that dealt with highly masochistic themes.