Sadomasochism refers to the receiving of pleasure -- often sexual -- from acts involving receiving or giving pain or humiliation. The term comes from two authors on the subject Marquis de Sade is responsible for the "Sado" or "Sadism" side and Leopold von Sacher-Masoch the "masochism" side. Players in the BDSM scene, or practitioners of S&M usually seek out sexual gratification from these acts, but often times they derive other forms of pleasure as well.
The term BDSM is commonly used to describe activities between consenting adults to contain sadistic and masochistic elements. Masochists tend to be very specific about the types of pain may enjoy performing some and dislike in others. Many behaviors such as spanking, tickling and love bytes contain elements of sadomasochism.
In fetish play, the dominant, top or Master exhibits his sadistic or pain inflicting tendencies upon the submissive, bottom or slave. A slave and his Master have an understanding of what each person in the relationship needs. Before the first click of the handcuffs, practitioners and the B&D (bondage & discipline) arts discuss each other's limits and lay out a game plan for the bondage slave and master games.
as with many sexual interests, master and slave porn is a popular subject in sexual erotica. Master and slave sex can encompass a slave restrained by some form of bondage or in a cage where the Master has complete access to use the slave sexually, at his sole discretion. Many people have had fantasies of Master and slave sex through adolescence. In the fetish world they are able to put some of theose fantasies into reality.
I've often said, "often times, reality is much harsher and more painful than fantasy". Many times I'vs had a submissive in my dungeon asking for "extreme punishment", or "the biggest strap-on, slammed up my ass", yet when I try to fulfill those requests they beg me to stop. Be careful what you wish for, because in my dungeon, you just might get it.