sm is sexual sadism, usually s is the abuser, m is the abused party, s is also called the master, m is the slave, sm is a special sexual activity that connects sexual pleasure and pain, which is obtained through pain The sexual activity of sexual pleasure is an inversion of sexual desire, which is one of the important terms of bdsm. Almost all or part of the equipment is used in sadomasochistic activities, such as ropes, clips, enema, vibrating eggs, bondage supplies, fake jj, chastity belts and other sex toys and props. Let's take a look at the source of SM words, their first appearances, their meaning interpretation, sadomasochistic classification, and professional interpretation.