The wife who enjoys cuckolding her husband is frequently called a hotwife, or a cuckoldress if the man is more submissive. Such explicit sexual interaction is seen only rarely in public play spaces, and it is sometimes specifically banned by the rules of a party or playspace. In pornography, depictions of lesbian sex form a popular subgenre, directed toward a male heterosexual and female homosexual audience. Pregnancy fetishism is a context where pregnancy is seen by individuals or cultures as an erotic phenomenon. Reflective of its views on sexuality and culture, Japanese pornography delves into a wide spectrum of heterosexual, homosexual, and transgender sexual 3d hentai acts in addition to unique fetishes and philias. Matsuo used amateur actresses in his videos, and he usually traveled to their hometowns for the filming. Omorashi: The act of holding one own urine until the need to urinate is urgent, making another hold in their videos porno gay urine, or watching another person with an urgent need to urinate. For uncircumcised males, stimulation of the penis in this way comes from the pumping of the foreskin, in which the foreskin is held and slid up and down over the glans, which depending on foreskin length, is completely or partially covered and then uncovered in a rapid motion. Targets the male audience, but is much less popular than Yaoi. A pearl necklace is a slang term referring to a sexual act in which a man ejaculates semen on or near the neck, chest, or breast of another person. The genres of pornography are based on the type of activity featured and the category of participants, for example mateur pornography is a category of pornography that features models, actors or non-professionals performing without pay, or actors for whom this material is their only paid modeling work. Jerk off porn milf instruction features a performer encouraging or instructing the viewer to masturbate, often culminating in a countdown at the end of which the viewer is invited to induce orgasm. Such films continued to be produced but could only be distributed by underground channels.