Masturbation has been depicted in art since prehistoric times and is mentioned and discussed in very early writings. Big Beautiful Woman is a euphemism for an overweight woman and is frequently used in the context of fat fetishism. Bukkake videos are a relatively hot gay sex prevalent niche in contemporary pornographic films. Pornographic films or sex films are films that present sexually explicit subject matter for the purpose of sexual arousal and erotic satisfaction of the viewer. 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 reaches orgasm. Insertion in pornography features women inserting various odd objects into their anus or vaginas. In many cases, that person is also aroused by smelling body parts that milf fuck have a urine scent. However the genre remains a very small proportion of the pornographic DVD market; for example at porn retailer HotMovies. Fisting involves the insertion of one partner entire hand into a vagina or the anal cavity. As with most forms of sexual activity, anal sex participants risk contracting sexually transmitted infections . Well-known hentai movies female porn stars who expressed their pleasure in pegging their male partners include Taylor Wane, Debi Diamond, Brittany Andrews, and Monique Covét. This yields a view that would not be obtainable directly through the eyes of a person while experiencing the sex act. Twink pornography features younger performers, and usually features young men under 30 who identify as gay or bisexual. Ethnic pornography is a genre of pornography that features performers of specific ethnic groups, or depictions of interracial sexual activity. As observation is encouraged, voyeurism and exhibitionism are closely associated with dogging. It may involve sexual attraction to women who are pregnant or appear pregnant, attraction to lactation, or attraction to particular stages of pregnancy such as impregnation or childbirth. Weather Report Girl is considered yuri hentai in English usage for its depiction of lesbian sex, but in Japan it is just yuri.