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. Works in this genre may be considered adult for any number of reasons. Many of these activities might be based on rape. A bisexual threesome may involve a man having sex with a man and a woman, the woman having sex with a man and a woman, or all three having sex with each other. This type of pornography is almost exclusively hentai, as true hermaphroditic humans are not fertile and are not usually found in nature. The warm sensation felt when urine trickles on the body seems to give very relaxing and pleasurable feelings to the person. Rubber pornography involves rubber, latex, and similar materials. Before the enforcement of the Hays Code, some cartoon shorts contained humor that was aimed at adult audience members rather than children. HIV is among the infections that require such direct contact and is therefore very 3d hentai unlikely to be transmitted via mammary intercourse. Instead, all five fingers are kept straight and held as close together as possible , then slowly inserted into a well lubricated vagina gay cock or rectum. While some fantasize about a giantess who is slightly taller than himself, others are interested in giantesses that are hundreds or even thousands of feet tall. Creampie pornography features ejaculation inside the vagina , mouth or rectum instead of the common cum shot, followed by the visible seeping or dripping of semen from the vagina, mouth or anus. Such video tapes are often released without the consent of their subjects, and could potentially damage celebrities careers. In some creampie films, both gay and porn milf straight, intercourse and internal ejaculation are followed by performers licking up the semen that has dripped from their bodies.