Strictly speaking, bondage means binding the partner by tying their appendages together; for example, by the use of handcuffs or by lashing their arms to an object. In addition to mainstream pornography, the popularity of facials has led to creation of its own niche market, like video series that specialize in showing the act. The terms can be complimentary or pejorative. Generally, interest differs between people, and gender depends on sexual orientation. The effect is to give the viewer the sense that they are experiencing the sex acts that they are watching, as opposed to simply watching others as a voyeur. Central to the typical MILF narrative is an age-play dynamic of older women and younger lovers. Caro rejected that as being a necessary conclusion, stating that female fatty deposits on the hips improve individual mature milfs fitness of the female, regardless of sexual selection. The stimulation may involve hands, fingers, everyday objects, sex toys or combinations of these. An orgy is a gathering where guests freely engage in open and unrestrained sexual activity or group sex; and a bunga bunga orgy is an orgy in which participants have sex underwater, such as in a swimming pool or a hot tub. Especially gay fuck popular in post-World gay hentai War 2 Japanese culture. Hentai is the various forms of Japanese pornography, including H-manga, H-anime, and H-computer games. First found in softcore movies and erotic thrillers, depictions of lesbianism entered mainstream cinema in the 1980s. When questioned about her particular kink Covét replied, If we women have to take it from behind, then why not a man? Targets the male audience, but is much less popular than Yaoi. As of 2010, they were reported to live together as a monogamous couple outside of their porn careers and want to continue working together for another 50 years. Cum-shot pornography features a collection of male ejaculation scenes. Gonzo porn is influenced by amateur pornography, and it tends to use far fewer full-body/wide shots in favor of more close-ups .