Unlike the usual power neutral relationships and play styles commonly followed by couples, activities and relationships within a BDSM context are often characterized by the participants taking on complementary, but unequal roles; thus, the idea of informed consent of both the partners becomes essential. The activity is done by itself or as a part of or prelude to other activities which many times involve sex. Women with women Main article: Lesbianism in erotica: anime hentai Lesbianism in contemporary pornography Lesbian or girl-girl pornography features women engaged in sex together, but is typically aimed at a male audience. The term has origins in the Greek language . 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. Such works have also often been subject to censorship and other legal restraints to publication, display or possession. Today, religions vary in their views of masturbation; some view it as a spiritually detrimental practice, some see it as not spiritually detrimental, and others take a situational view. In a few relationships, it leads as far as total submission of one partner in the truest sense of the phrase total power exchange . A celebrity sex tape is typically an amateur pornographic video recording involving one or more celebrity famous person which has, intentionally or unintentionally, gay cock been made available publicly. 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. The primary subjects of pornographic depictions are pornographic models, big tit milf who pose for still photographs, and pornographic actors or porn stars, who perform in pornographic films.