Dominance & Submission,

In the context of BDSM, bondage involves people being tied up or otherwise restrained for pleasure. Bondage is usually, but not always, a sexual practice. The paraphilia of being sexually aroused by bondage is sometimes known as vincilagnia .Studies in the U.S. have shown that about three quarters of all men find the idea of bondage to be erotic; many women do as well. As with any study of sexual thoughts and behavior, the available studies are not well controlled and the best studies are now out of date

BDSM is the collective term for a group of related sexual preferences common in literature, which are sometimes less accurately designated "Sadomasochism" or colloquially as "S and M" or "S/M".

The term "BDSM" is an acronym derived from the English-language terms Bondage & Discipline, Dominance & Submission, Sadism & Masochism, and describes a spectrum of behavior, usually sexual, which includes dominance and submission, punishment, masochism and bondage play, among other things.