In Japanese, this natural-fibre rope is known as asanawa; the Japanese vocabulary does not make a distinction between hemp and jute. In the fetish cuckolding subculture, it is most common for the female hentai movies to take on the sexually dominant role and the male the submissive role, however, female subs, sometimes referred to as cuckqueans, also exist. The term is typically used by the cinematographer within the narrative framework of a pornographic film, and since the 1970s has become a leitmotif of the hardcore genre. Irrespective of the legal or social view of pornography, it has been used in a number of contexts. Multiple men and women Bisexual pornography features one woman and two men who all perform sex acts on each other. Some are aroused from wetting their diapers, others like messing their diapers. If one person is penetrated by two objects, it is generically called double penetration . Commenting on why there are not as many female macrophiles, psychologist Helen Friedman theorized that because women in most societies already view men as dominant and powerful, there no need for them to fantasize about it. Two women tapegagged and cuffed to iron bars Bondage and Discipline are two aspects of BDSM that do not seem to relate to each other because of the type of activities involved, but they have conceptual similarities, and that is why they appear jointly. Medical pornography involves sexualized medical, often fake, including gynecological pelvic examinations, rectal examinations, and pelvic or gynecological ultrasounds. In Canada, Teletoon offers up its own Teletoon at Night programming block. Felching is a sexual practice involving the milf fuck act of orally sucking semen out gay movies of the vagina or anus of one partner. The niche popularity grew significantly in the latter half of the first decade of the 2000s. Oral sex pornography frequently features a person performing fellatio, and less frequently cunnilingus. Bondage websites and bondage imagery in mainstream pornography As of 2003, specialist bondage magazines were mostly displaced by the availability of bondage material on the World Wide Web, and the presence of bondage imagery in mainstream pornographic magazines such as Nugget and Hustler Taboo magazine.