A variation on this is to place the fingers and thumb on the penis as if playing a flute, and then shuttle them back and forth. Sexologist Alfred Kind suggested that the buttocks is the primary sexual presentation site in primates. Most soft crush fetishists avoid being placed under the same label as hard crush fetishists, believing that crush films with larger animals give the entire group a bad label. Reflective of its views on sexuality and culture, Japanese pornography delves into a wide spectrum of heterosexual, homosexual, and transgender sexual acts in addition to unique fetishes and philias. There is also some evidence that pornography can be used gay cock to treat voyeurism. A crush fetish is a fetish in which one is sexually aroused usually when someone crushes hentai videos objects, food, and sometimes small animals with their body, usually under their foot, or when crushed oneself. Such explicit sexual interaction is seen only rarely in public play spaces, and it is sometimes specifically banned by the rules of a party or playspace. 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. Klaw ran an international mail-order business out of his store, Movie Star News, selling cheesecake pinups and momporn bondage/spanking photos. Matsuo used amateur actresses in his videos, and he usually traveled to their hometowns for the filming. These scenes may involve the female actor calling for the shot to be directed at some specific part of her body. It is suggested that much of the obscurity and the uncertainties about female ejaculation are related to mixing up these two phenomena. Shibari is a Japanese word that literally means to tie or to bind. Sex parties may be organized to enable people to engage in casual sexual activity or for swinging couples or people interested in group sex to meet, but any gathering where sexual activity is anticipated can be called a sex party.