Typically features adult, masculine men with varying degrees of muscle, body fat, and body hair, akin to beefcakes, or bears. Arcane or occult pornography involves sexualized situations with an occult or magical tone or performers who costume themselves in keeping with the theme, horny milfs for example, a male performer dressed as a wizard. While wearing diapers, a diaper fetishist generally experiences a comforting feeling. The actual height of the giantess within the fantasy may vary depending on the individual. Women with women Main article: Lesbianism in erotica: Lesbianism in contemporary pornography Lesbian or girl-girl pornography features women gay cock engaged in sex together, but is typically aimed at a male audience. Diaper fetishism is totally independent from pedophilia as the wearer derives pleasure only from the diaper and/or use of it. The study also found that participants reacted positively to a much wider range of figures than a control group, even rating emaciated figures higher. The warm sensation felt when urine trickles on the body seems to give very relaxing and pleasurable feelings to the person. Works in this genre may explore philosophical, political or social issues. Some people masturbate by using machines that simulate intercourse. No causal relationship is known between masturbation and any form of mental or physical disorder. Sadism describes sexual pleasure derived by inflicting pain, degradation, humiliation on another person or causing another person to suffer. In the Diagnostic and Statistical Manual of Mental Disorders , published by the American Psychiatric Association, it is classified under 302.89 – Paraphilia NOS and has no diagnostic criteria other than a general statement about paraphilias that says the diagnosis is made if the behavior, sexual urges, or fantasies cause clinically significant distress or impairment in social, occupational, or other important areas of functioning. In the 18th and 19th centuries, some European theologians and physicians described it as heinous, deplorable, 3d hentai and hideous, but during the 20th century, these taboos generally declined.