There may be more than two participants; both group sex and gang banging can be included. Some restrict a policy of panties/nipple tape for females and some allow full nudity with explicit sexual interaction allowed. Lucky Pierre is slang for a person performing both receptive and insertive anal and/or vaginal sex simultaneously during a threesome, being positioned between the two partners. Tentacle rape or shokushu goukan is found in some horror or hentai titles, with tentacled creatures having sexual intercourse with female characters. Japanese videos gays rope bondage is distinguished by its use of specific katas and aesthetic rules. Big Beautiful Woman is a euphemism for an overweight woman and is frequently used in the context of fat fetishism. Some BDSM practitioners prefer a code of behavior that differs from SSC and is described as risk aware consensual kink , indicating a preference for a style in which the individual responsibility of the involved parties is emphasized more strongly, with each participant being responsible for his or her own well-being. The terms can be complimentary or pejorative. Shibari is a Japanese word that literally means to tie or momsex to bind. Unlike the traditional definition of the term, in fetish usage a cuckold is complicit in their partner sexual infidelity and takes masochistic sexual pleasure in it. Actual upskirt or downblouse shots may violate privacy laws in some countries. Pornographic films are generally classified into sub-genres which describe the sexual fantasy which the film and actors attempt to create. Participants usually derive pleasure from this, even though many of the practices—such as inflicting pain or humiliation or being restrained—would be unpleasant under other circumstances. This category also includes pornographic home movies. Lesbianism has been a theme in erotic art since at least the time of ancient Rome, and many regard depictions of lesbianism to be erotic. Examples hentai videos include the Girls Gone Wild and Girls Who Like Girls Series.