Disorders of sexual preference or paraphilias are bizarre patterns of sexual behavior that have diverse manifestations and are of complicated sexual orientations. Some of these are harmless, while others are not, robbing sufferers and possibly their partners of loving sexual relationship. At least 40 paraphilias have been named, but the full extent of the field, perhaps, is still undiscovered. Recent studies have reported many paraphilias as long-term effects of sexual abuse in childhood, and the more frequent and persistent the abuse is, the worse the long-term psychologic, behavioral, and relationship problems. Psychopathology within this group of disorders may lead to criminal behavior, ranging from infringement of decency to some of the most heinous crimes known.