The allusion is to the use of hemp rope for restraining prisoners, as a symbol of power, in the same way that stocks or manacles are used in a Western BDSM context. In these research publications, it is suggested that real female ejaculation is the release of a very scanty, thick, and whitish fluid from the female prostate, while the squirting or gushing shown frequently in pornography is a different phenomenon, the expulsion of clear and abundant fluid, which has been shown to be a diluted fluid from the urinary bladder. Some men place both hands directly on their penis during masturbation, while others may use their free hand to fondle their testicles, nipples, or other parts of their body. Only in the 1970s were pornographic films semi-legitimized; and by the 1980s, pornography on home video achieved wider distribution. Key party A key party is a form of swinger party, in which male partners place their car and house keys into a common bowl or bag on arriving. Typically features adult, masculine men with varying degrees of muscle, body fat, and body hair, akin to beefcakes, gay cock or bears. The current public acceptance of celebrities with sex tapes is speculated by Joe Levy, executive editor of Rolling Stone, to be due to the easy availability of pornography, as well as couples more commonly making their own tapes due to the prevalence of video cameras. Point of view pornography is adult entertainment filmed to look as if the watcher were experiencing the sex act themselves. Milking pornography features lactating women hentai sex being milked or milking themselves . Nevertheless, it is only an attempt at phenomenological differentiation. These are mature milfs often fake. Swinger parties may involve various group sex activities. Breeding is sometimes followed by felching, which involves sucking the semen from the partner anus. Works in this genre may explore philosophical, political or social issues. The Girls Gone Wild series is one example. In recent years, however, many celebrities have benefited from the publicity resulting from the release of a sex tape.