Pornography is often distinguished from erotica, which consists of the portrayal of sexuality with high-art aspirations, focusing also on feelings and emotions, while pornography involves the depiction of acts in a sensational manner, with the entire focus on the physical act, so as to arouse quick intense reactions. Buttocks are sometimes emphasized in pornography, where they are often gay fuck referred to as booty. New York photographer Irving Klaw also published illustrated adventure/bondage serials by fetish artists Eric Stanton, Gene Bilbrew, Adolfo Ruiz and others. In the fetish cuckolding subculture, it is most common for the female to take on the sexually dominant role and the male the submissive role, however, female subs, sometimes referred to as cuckqueans, also exist. It is geared towards heterosexual men, who most typically define a threesome as such. The other person may do the same during or after. John Stagliano is considered to have started the gonzo hentai movies pornography genre with his Buttman series of films. Its gain in prominence has been attributed to its depiction in the film Pecker, which was released in 1998. A woman can use a secondary vibrator, between the dildo and her genitals, to get pleasure from pegging. At the end of the evening the female partners would randomly select keys from the bowl and leave with that key owner. The actual height of the giantess within the fantasy may vary depending on the individual. In POV porn, the shooting style is generally similar to gonzo momporn pornography, with the person receiving sexual gratification holding the camera him or herself—aiming it down at the actress or actor who is performing the sex act. Bukkake is a sex act portrayed in pornographic films, in which several men ejaculate on a woman, or another man. Being forced to wear diapers as a form of humiliation is sometimes a behavior encountered in sexual masochism. Use of the agreed safeword is seen by some as an explicit withdrawal of consent. Women oriented pornography is sometimes referred to as sex positive pornography.