Related genres include: Amateur pornography originally referred only to pornography produced by amateurs but now also includes professionally made pornography designed to appear as if it were amateur. Sexologist Alfred Kind suggested that the buttocks is the primary sexual presentation site in primates. The object or situation of interest is called the fetish; the person who has a fetish for that object/situation is a fetishist. It is commonly depicted in pornography, but very rarely in mainstream cinema. Bareback sex is physical sexual activity, especially sexual penetration, without the use of a condom. Female ejaculation is the expulsion of fluid by the paraurethral ducts through and around the human female urethra during or before an orgasm. The smotherbox is placed on a stable surface. The term applies to the depiction of the act rather than the act itself, and so does not include live exhibitions like sex shows and striptease. Since at least 1973, it has also been used to refer to a sexually attractive young woman. Crying pornography that features participating actors crying. Usually that lesbian hentai person prefers to stage the wetting so that his/her legs become soaked with urine. This may help them develop their orgasm, increase its pleasure, and may inspire them to masturbate on a more frequent basis. There were also a very limited number of specialist fetish magazines which featured images of bondage, such as the famous Bizarre magazine published from 1946 to 1959 by the pioneering fetish photographer John Willie, and ENEG Exotique magazine, published 1956-1959. Can also include auto-fellatio, or performing oral sex on oneself. Generally, gay sex video interest differs between people, and gender depends on sexual big tit milf orientation. Some restrict a policy of panties/nipple tape for females and some allow full nudity with explicit sexual interaction allowed. It is sometimes described as a sexual fantasy, by women or men, depicting an exhibitionist or physique worship scenario. Tentacle rape or shokushu goukan is found in some horror or hentai titles, with tentacled creatures having sexual intercourse with female characters.