A bisexual threesome may involve a man having sex with a man and a woman, the woman having sex with a man and a woman, or all three having sex with each other. Real school shots or videos which are sexualized may violate privacy laws in some countries. Lolita pornography that features actual teenage girls under the age of 18 is illegal in most countries and treated as child or youth pornography. A celebrity can fight the release in court to maintain deniability while still enjoying the career benefits. Ass to mouth is a slang term primarily used to describe the withdrawal of a penis from the receptive partner anus followed by the immediate insertion into the receptive partner mouth. Bear features a combination of middle-aged, hairy or overweight males. Crush pornography features objects being crushed by an actress or actor, who generally plays an overtly dominant role. Swinging can take place in various contexts, ranging from a spontaneous sexual activity at an informal social gathering of friends to a regular social gathering in a sex club or residence. Positions can also be chosen specifically for added effects such as increased humiliation, elevation and suspension. No causal relationship is known between masturbation and any form of mental or physical disorder. Unlike smothering, in facesitting the bottom partner is not deprived big tit milf of air. Mutual masturbation foreplay The manual stimulation of each other genitals where the session eventually leads to sexual intercourse. HIV is among the infections that require such direct contact and is therefore very unlikely to be transmitted via mammary intercourse. The loose and direct camera work often includes tight shots of the genitalia, unlike some traditional porn. A facial is a term for the sexual activity in which a man ejaculates semen onto the face of one or more sexual partners. Being forced to wear diapers as a form of humiliation is sometimes a behavior encountered in sexual masochism. Some pornographic films use an artificial semen 3d hentai substitute to gay boy porn simulate or enhance creampie shots.