Gay pornography is the representation of sexual activity between males. The resulting consent and understanding is occasionally summarized in a written contract, which is an agreement of what can and cannot take place. Scat or brown pornography features defecation, manipulation of feces, or consumption of feces, in reality or fantasy; a well-known example is the 2 Girls 1 Cup video. These are often fake. The purpose of this kind of agreement is primarily to encourage discussion and negotiation in advance, and then to document that understanding for the benefit of all parties. 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. Cheerleader pornography involves pictures of cheerleaders, both staged and real. Felching is a sexual practice involving the act of orally sucking semen out of the vagina or anus of one partner. In contrast, a celebrity may take the route of openly releasing the tape and benefit directly from royalties videos gays as well as indirectly from the publicity. A scene where many women have sex with one man is referred to as a reverse gang-bang. In the West, masturbation in private or with a partner horny milfs is generally considered a normal and healthy part of sexual enjoyment. They may be noted for using risqué themes, graphic violence, sexuality or black comedy in a manner that is unsuitable for younger audiences. Among fetishists, the pose of reluctance—the victimization of the cuckold—is a major element of the paraphilia. Lolita pornography caters to ephebophiles. To avoid soreness from this resulting friction, some may prefer to use a personal lubricant, masturbation cream or saliva during masturbation. Group sex also occurs in populations of non-human hentai porn animals such as bonobo apes and chimpanzees. The consensual submission of the submissive is sometimes demonstrated to others by symbols indicating his/her belonging to the dominant, such as wearing a collar, special tattoos, piercings, a very short haircut or a bald head.