WordNet (r) 3.0 (2006):

self-gratification
    n 1: indiscipline with regard to sensuous pleasures [syn:
         dissoluteness, incontinence, self-gratification]
    2: the act of satisfying your own desires and giving yourself
       pleasure [syn: self-gratification, head trip]

Moby Thesaurus II by Grady Ward, 1.0:

40 Moby Thesaurus words for "self-gratification":
   amusement, animal pleasure, bodily pleasure, carnal delight,
   comfort, content, contentment, coziness, creature comforts, ease,
   endpleasure, enjoyment, entertainment, euphoria, forepleasure,
   fruition, fun, gratification, great satisfaction, gusto,
   hearty enjoyment, intellectual pleasure, joie de vivre,
   keen pleasure, kicks, luxury, physical pleasure, pleasure,
   quiet pleasure, relish, satisfaction, self-indulgence,
   sensual pleasure, sensuous pleasure, sexual pleasure,
   sweetness of life, titillation, voluptuousness, well-being, zest