These agreements are binding in the sense that the parties have the expectation that the negotiated rules will be followed. Foot fetishism, foot partialism, foot worship, or podophilia is a pronounced sexual interest in feet. Fantasies of group sex are extremely common among both men and women, and group sex is a subgenre in pornographic films. Crying pornography that features participating actors crying. The higher pay scale and profile within a production often leads to group scenes where a straight actor only tops. Some BDSM practitioners prefer a code of behavior that differs from SSC and is described as risk aware consensual kink , indicating a preference for a style in which the individual responsibility of the involved parties is emphasized more strongly, with each participant being responsible for his or her own well-being. This style of filming is in contrast to having a separate, third-person camera crew filming all the action. Each participant may engage in any type of sex acts with one or both of the others, such as vaginal, anal or oral sex or mutual masturbation. Central to the typical MILF narrative is an age-play gay movies dynamic of older women and younger lovers. Squirt pornography involves women ejaculating. Fetish cuckolding can have a wide range of expression, from pillow-talk fantasy between monogamous partners to extreme alternative lifestyles, depending on the hentai sex couple. Guro or Gore is a genre of Japanese pornography involving blood, gore, disfiguration, violence, porn milf mutilation, urine, enemas, or feces. The effect is to give the viewer the sense that they are experiencing the sex acts that they are watching, as opposed to simply watching others as a voyeur. In many cases, that person is also aroused by smelling body parts that have a urine scent. Other possibilities are possible, such as a man having sex with two women who are having sex with each other. Boot fetishism is a sexual fetish dedicated to boots. Mutual masturbation is a sexual act where two or more people stimulate themselves or one another sexually, usually with the hands.