Each participant may engage in any type of sex acts with one or both of the others, such as vaginal, anal or oral sex or mutual masturbation. Animal masturbation has been observed in many species, both in the wild and in captivity. A variation on this is to place the fingers and thumb on the penis as if playing a flute, and then shuttle them back and forth. In some societies, the terms fox, plum, chick, or chicken are preferred. The term applies to the depiction of the act rather than the act itself, and so does not include live exhibitions like sex shows and striptease. Sometimes special furniture is used, such as a queening stool or smotherbox. The scenario is a genre of erotica, which on the internet is sometimes abbreviated to CMNF, and may involve sexual and nonsexual erotic scenarios. Tentacle rape or shokushu goukan lesbian milfs is found in some horror or hentai titles, with tentacled creatures having sexual intercourse with female characters. Examples include the anime hentai Girls Gone Wild and Girls Who Like Girls Series. Actual upskirt or downblouse shots may violate privacy laws in some countries. Actual spying may violate privacy and/or trespassing laws in many countries. The prostate gland is one of the organs that contributes fluid to semen. Many gay fuck men who like trans partners of any variety, known as tranny chasers, do not necessarily identify as gay themselves. It is sometimes described as a sexual fantasy, by women or men, depicting an exhibitionist or physique worship scenario. Since the 1980s, many practitioners 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. As in B/D, the declaration of the Top/Bottom may be required, though sadomasochists may also play without any Power Exchange at all, with both partners equally in control of the play. A celebrity may allow such a recording to surface willingly, as part of a publicity stunt.