BDSM
Sadomasochism is also referred to as BDSM, and this abbreviation comes from the English BDSM. She, in turn, is derived from the abbreviation, but slightly longer. About in 1990-e years there was a term BDDSSM, where each pair of letters means something: BD (Bondage and Discipline) is bondage (bondage and discipline, DS (Domination and Submission is dominance and obedience, and SM (Sadism and Masochism) is, in fact, is bdsm.
As a rule, people who are interested in BDSM in varying degrees try different the direction of this movement.
Sadism and masochism
In the context of BDSM sadism and masochism are the subject of the agreement, and all actions are performed with the consent of both partners, even if one of them (or both) feels real physical pain during a session, or receives physical damage. This is a very important point. BDSM is not violence, although it has such an appearance. Usually parties agree on the so-called "stop-word", and if one person says a word, the other is obliged to stop. The main principles of BDSM is the reasonableness, voluntariness and safety.
Sadism is the desire to cause someone pain. Masochism respectively, the desire to get this same pain. Partners with opposite inclinations to find each other, and both be happy.
However, this does not happen always, more often if the person is prone to bdsm, he is interested in both sides of the process. Therefore, when formed by a BDSM couple, they are likely to experiment and switch roles. It's called "switch, English switch, switch.
Role and life in BDSM
Master and Servant (or Dominant and Submissive) is a very popular division. Someone is the leader and the other partner obeys. When it is combined with bdsm, it is not necessary to master, or dominant, was the one who inflicts the pain, and the slave to those who would take it. Sometimes Vice versa.
Bandagiste are people who love fixing partner, in other words, linking.
Also sado-masochism is both physical and moral. Of course, these phenomena are to some extent always suppressed, but the divide exists, and it is not obvious.
There are so called "session" sado-masochists. People who live a normal life, but sometimes they want to get away from all this and feel like someone else. They can be very senior or responsible in everyday life, but in their sexual adventures want to relax.
In General, adherents of BDSM can be divided into permanent and session, that is, those for whom it's a lifestyle, and those who just decides to have fun or escape from reality this way, or maybe just to diversify your sex life.