Masturbation has been depicted in art since prehistoric times and is mentioned and discussed in very early writings. Although interracial pornography theoretically can apply to depictions of sexual activity between performers of any different racial groups, the term is most commonly used for heterosexual sex acts between black and white performers. It can be combined with fellatio and the woman may move her breasts up and down on the penis for an additional stimulation, usually before the man gay hentai reaches orgasm. Bukkake pornography usually depicts numerous men having sex with one woman, with multiple, usually 10 or more, men ejaculating on the female face. When all regions of the face are included, facial cum shots comprise approximately 62% of scenes where external ejaculation occurs. For example, the Kama Sutra, in particular, goes into specific detail on how to properly strike a partner during sex. In gay pornographic movies, actors who identify themselves as heterosexual, but who nevertheless perform explicit sexual acts with other males naked milf on film do not face the same stigmas as the mainstream acting counterparts and indeed can rise quickly to being featured actors. It is also often mixed with other fetishes in practice, such as voyeurism, denial, etc. Bukkake videos are a relatively prevalent niche in contemporary pornographic films. The films were financially successful, winning AVN Awards for the best selling pornographic films of their year; however the gay cock events were effectively un-officiated and the record breaking claims often misleading. Contact mutual masturbation One person touching another person to masturbate. High heel pornography involves women or men dressed in high heeled shoes. Though the term anal sex most commonly means penile-anal penetration, sources sometimes use the term anal intercourse to refer exclusively to penile-anal penetration, and anal sex to refer to any form of anal sexual activity, especially between pairings as opposed to anal masturbation.