It is also referred to as anal–oral contact and anal–oral sex, or colloquially as rimming or a rim job, and may be performed by or on people of any sexual orientation for personal pleasure or as a form of erotic humiliation. By comparison, gonzo pornography puts the camera right into the action, often with one or more of the participants gay cock both filming and performing sexual acts, without the usual separation between camera and performers seen in conventional porn and cinema. On the other hand, the masochist enjoys being hurt, humiliated, or suffering within the consensual scenario. Such documents have not been recognized as being legally binding, nor are they intended to be. In general, as compared to conventional relationships, BDSM participants go to great lengths to negotiate the important aspects of their relationships in advance, and to take great care in learning about and following safe practices. 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. The term BDSM dates back to 1969; however, the origin of the term BDSM is unclear and is believed to have been formed either from joining the term gay hentai B&D with S&M , or as a compound initialism from B&D, D&S , and S&M. The volume of semen that is ejaculated depends on several factors, including the male health, age, degree of sexual excitement, and the time since his last ejaculation. Reality pornography is a genre of pornography where staged scenes, usually shot in cinéma vérité fashion, set up and precede sexual encounters. The cover can have hinges or be a separate part. Perhaps following lesbian milfs 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 precise definition of celeb sex tapes roles and self-identification is a common subject of debate, reflection, and discussion within the community.