New York photographer Irving Klaw also published illustrated adventure/bondage serials by fetish artists Eric Stanton, Gene Bilbrew, Adolfo Ruiz and others. Sexual relations between women have been illustrated as well as narrated, but much of the written material from the early modern period has been destroyed. Tentacle erotica can be consensual, but frequently contains elements of non-consensual sex. For much of the history of cinema and television, lesbianism was considered taboo, though since the 1960s it has increasingly become a genre in its own right. What seems clear from the historical record is that much of the lesbian material in pornographic texts was intended for a male readership. Bondage pornography specializes in the depiction of sexual bondage or BDSM activities as photographs, stories, movies, or drawings. Double penetration of the vagina, anus and mouth, can involve: Simultaneous penetration of the anus by two penises or other objects. The volume of semen that is ejaculated depends on several factors, including the male health, age, degree of sexual excitement, and the time since his last ejaculation. The full-weight body-pressure, moisture, sex odors and darkness can be perceived as powerful sexual attractions or compulsions. Oral sex pornography frequently features a person performing fellatio, and less frequently cunnilingus. Voyeur pornography may also include shots of topless women anime hentai on topless beaches who are unaware of the cameras but may legally be photographed due to the public setting. Irrespective of the legal or social view of pornography, it has been used in a number of contexts. John Stagliano is considered to have started the gonzo pornography genre with his Buttman series of films. This genre also features male-on-male fellatio through a small hole made in a bathroom divider. In Japanese, mature milfs this natural-fibre rope is known as asanawa; the Japanese vocabulary does not make a distinction between hemp and jute. The loose and direct camera work often includes tight shots of the genitalia, unlike some hot gay sex traditional porn.