Sexual sadism is a feeling of sexual excitement due to administering pain, suffering, or humiliation to another person. Individuals with this disorder have fantasies in which sexual excitement results due to inflict psychological or physical suffering on a sexual partner. Sometimes sexual sadism leads to illegal activities such as rape, torture, and murder, in which cause death of the victims. Transvestitism ( transvestic fetishism) refers to practice of wearing the clothes of the opposite sex (cross-dressing), generally to have sexual pleasure. Most transvestites are men who comfortably fill male roles in society and are satisfied with their biological sex. It is associated with homosexuality. But transvestites may be either heterosexual or homosexual. Voyeurism ("Peeping Tom") is a disorder which an individual achieve sexual arousal by observing an unsuspecting and non-consenting person who is undressing or unclothed, and/or engaged in sexual activity or other actions usually considered to be of a private nature. The voyeur does not have any sexual contact with the person who they are observing. This behavior may finish with masturbation by the voyeur. Most cases of paraphilia are treated with counseling to help these people to improve their behavior. Medications also can be given to decrease the compulsiveness associated with the disorders. And also medications can reduce unusual and abnormal sexual fantasies and behaviors.