The Collaborative International Dictionary of English v.0.48:

autoeroticism \autoeroticism\, autoerotism \autoerotism\n.
   using you own body as a sexual object.
   [WordNet 1.5]

WordNet (r) 3.0 (2006):

autoeroticism
    n 1: using you own body as a sexual object [syn:
         autoeroticism, autoerotism]

Moby Thesaurus II by Grady Ward, 1.0:

78 Moby Thesaurus words for "autoeroticism":
   active algolagnia, algolagnia, algolagny, amour-propre,
   amphierotism, anal intercourse, bestiality, bisexuality, buggery,
   complacency, consequentiality, coprophilia, cunnilingus, ego trip,
   exhibitionism, fellatio, fellation, fetishism, hand job,
   heterosexuality, homoeroticism, homosexualism, homosexuality,
   incest, incestuousness, irrumation, lesbianism, manipulation,
   masochism, masturbation, narcism, narcissism, necrophilia, onanism,
   oral-genital stimulation, overproudness, overweening pride,
   paraphilia, passive algolagnia, pederasty, pedophilia, sadism,
   sadomasochism, sapphism, scotophilia, self-abuse, self-admiration,
   self-approbation, self-complacency, self-congratulation,
   self-content, self-delight, self-endearment, self-esteem,
   self-gratulation, self-importance, self-infatuation, self-love,
   self-respect, self-satisfaction, self-sufficiency, self-worship,
   sexual inversion, sexual normality, sexual preference, smugness,
   sodomy, swinging both ways, transvestitism, tribadism, tribady,
   vaingloriousness, vainglory, vainness, vanity, voyeurism,
   zooerastia, zoophilia