It is reported that some submissives enjoy the care they received from their masters after the roleplay the most.
http://en.wikipedia.org/wiki/Sadomasochism
Modern Psychology
There are a number of reasons commonly given for why a sadomasochist finds the practice of S&M enjoyable, and the answer is largely dependent on the individual. For some, taking on a role of compliance or helplessness offers a form of therapeutic escape; from the stresses of life, from responsibility, or from guilt. For others, being under the power of a strong, controlling presence may evoke the feelings of safety and protection associated with childhood. They likewise may derive satisfaction from earning the approval of that figure (see: Servitude (BDSM)). A sadist, on the other hand, may enjoy the feeling of power and authority that comes from playing the dominant role, or receive pleasure vicariously through the suffering of the masochist. It is poorly understood, though, what ultimately connects these emotional experiences to sexual gratification, or how that connection initially forms. Dr. Joseph Merlino, author and psychiatry adviser to the New York Daily News, said in an interview that a sadomasochistic relationship, as long as it is consensual, is not a psychological problem: