A common way that these are depicted in a single scene is with one woman and two men performing together. Pornography is often referred to as porn and a pornographic work as a porno. Bottom and submissive are widely recognized terms for those partner in the relationship or activity who are, respectively, the physically receptive or controlled participants. The buttocks in human females thus contain more adipose tissue than in males, especially after puberty. Heterosexual bareback sex, as opposed to sex with condoms, not only poses an increased risk of STIs, but for pregnancy as well. Since the 1980s, many practitioners gay movies 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. Going back at least as far as the Christy twins in the 1970s, depictions of incest and particularly incest between twins has been a feature of gay pornography. BDSM is a variety of erotic practices involving dominance and submission, role-playing, restraint, and other interpersonal dynamics. A male voyeur is commonly labeled Peeping Tom, a term which originates from the Lady Godiva legend. The name of the practice, when it is done in a repeated in-and-out motion, is derived from its passing resemblance to the dipping of a tea bag into a cup of hot water as a method of brewing tea. Reflective of its views on sexuality and culture, Japanese pornography delves into a wide spectrum of heterosexual, homosexual, and transgender sexual acts in addition to unique fetishes and philias. The scenario is a genre milf xxx of erotica, which on the internet is sometimes abbreviated to CMNF, and may involve sexual and nonsexual erotic scenarios. Bareback sex is physical sexual activity, especially sexual penetration, without the use of a condom. Actual spying may violate privacy and/or gay hentai trespassing laws in many countries.