Tentacle erotica can be consensual, hentai movies but frequently contains elements of non-consensual sex. Arcane or occult pornography involves sexualized situations with an occult or magical tone or performers who costume themselves in keeping with the theme, for example, a male performer dressed as a wizard. Hardcore pornography is pornography that depicts penetration or extreme fetish acts, or both. However, bisexual pornography is often placed near the gay section in adult video stores, since many consumers are gay men. Common phrases used to refer to these individuals are chicks with dicks or the derogatory term shemale, although these are generally considered pejorative among transwomen. Some pornographic films use an artificial semen substitute to simulate or enhance creampie shots. Solo pornography recognized with AVN Awards include the All Alone series and All Natural: Glamour Solos. Yaoi is anime or manga that features gay males . Additionally, the buttocks give an indication of the shape and momsex size of the pelvis, which impacts reproductive capability. 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. Internationally, hentai is a catch-all term to describe a genre of anime and manga pornography. Cuckolding can also be mixed with other non-monogamous relationship arrangements with which it has substantial overlap such as Swinging, wife-swapping, open relationships, and polyamory, etc. John Stagliano is considered to have started the gonzo pornography genre with his Buttman series of films. It is typically animated pornography, gay twinks as the legal age to be featured in a pornographic film in Japan is 18. The act may be carried out face to face, or head to tail, with the woman recommended to be on top if she has smaller breasts. Many cultures describe pain as an aphrodisiac. It is also followed by dedicated industry publications and trade groups as well as the mainstream press, private organizations , government agencies, and political organizations.