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. The reverse of this, in which nude women interact with clothed men, is called Clothed male, naked female . Specific sex acts Anal Anal pornography features anal penetration with a penis, dildo, other objects, or some combination of them. Since the 1980s, many practitioners and organizations have adopted the motto safe, sane and consensual, commonly abbreviated as SSC, which means that everything is based on safe activities, that all participants be of sufficiently sound/sane mind to consent, and that all participants do consent. Pornography in Japan is large and intertwined business of adult entertainment with unique characteristics that readily distinguish it from western pornography. The Silent Duck, gaysex also called Duck-Billing, is the technique often used in which the person engaging in hand insertion shapes the hand to resemble a duck beak. Hardcore pornography is pornography that depicts penetration or extreme anime hentai fetish acts, or both. These agreements are binding in the sense that the parties have the expectation that the negotiated rules will be followed. A crush fetish is a fetish in which one is sexually aroused usually when someone crushes objects, food, and sometimes small animals with their naked milf body, usually under their foot, or when crushed oneself. Mammary intercourse is a sex act, performed as foreplay or as non-penetrative sex, that involves the stimulation of the male penis by the female breasts and vice versa. A homosexual threesome would involve either three men or three women. It has also been recommended as a form of foreplay or safer sex. Mutual masturbation can be practiced by males or females in pairs or groups with or without actually touching another person as indicated by the following examples of contact versus non-contact scenarios: Non-contact mutual masturbation Two people masturbating in the presence of each other but not touching.
