mas·och·ism 
(măsə-kĭz′əm)
(măsə-kĭz′əm)n.
1. The deriving of sexual gratification from fantasies or acts that involve being made to suffer physical or mental pain. Also called sexual masochism.
2. The deriving of pleasure from being humiliated or mistreated, either by another or by oneself.
3. A willingness or tendency to subject oneself to unpleasant or trying experiences.
[After Leopold von Sacher-Masoch (1836-1895), Austrian novelist .]
masoch·ist n.
mas′och·istic adj.
mas′och·isti·cal·ly adv.