This type of pornography is almost exclusively hentai, as true hermaphroditic humans are not fertile and are not usually found in nature. 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. New swinging couples often choose a soft swap before they are comfortable with a full swap, although many couples stay soft swap for personal reasons. Some pornographic films use an artificial semen substitute to simulate or enhance creampie shots. See also Gay-for-pay. A person may be sexually penetrated multiple times simultaneously. Such documents have not been recognized as being legally binding, nor are they intended to be. In the gay pornography industry, which uses amateurs as well as professional actors, the term gay-for-pay refers to actors labeled or believed to be straight but who engage in same-sex sexual activities big tit milf for money. The term breast fetishism is also used to refer to cultural attention to female breasts and the sexuality they represent, with debate continuing as to whether the modern widespread fascination with breasts among heterosexual males in western societies is a sexual fetish. Perhaps following the example set by gay pornography, they have become a popular subgenre within heterosexual pornography since the turn of the century, featuring both vaginal and anal ejaculations. The loose and direct camera work often includes tight shots of the genitalia, unlike some gay cock traditional porn. 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. The term has origins 3d hentai in the Greek language . They may be noted for using risqué themes, graphic violence, sexuality or black comedy in a manner that is unsuitable for younger audiences. Gay pornography is the representation of sexual activity between males. Works in this genre may explore philosophical, political or social issues.