BDSM
BDSM (bondage and discipline, domination and submission, sadism and masochism) is a catch all phase used to describe an interest in sadomasochism, power exchange or bondage. Strictly speaking fetishism is a not part of BDSM, but fetish imagery but is very common in visual depiction of BDSM activities. To someone outside of the fetish / BDSM scene it might appear to be a very homgeneous group of people, this is not the case however. An interest in BDSM is a paraphilia and as such the stimulous that brings on the sexual arousal in an individual will vary from person to person. For one person objectification and sexual humiliation might be a huge turn on whilst the thought of being caned by a dominant does nothing to them at all. For another person the reverse might be the case.
Broadly speaking BDSM can be sub divided into a number of different categories;
Bondage: Restraining someone or tying them up.
