Some people get sexual pleasure by inserting objects, such as urethral sounds, into the urethra , a practice known as urethral play or sounding. The current public acceptance of celebrities with sex tapes is speculated by Joe Levy, executive editor of Rolling Stone, to be due to the easy availability of pornography, as well as couples more commonly making their own tapes due to the prevalence of video cameras. The volume of semen gay sex video that is ejaculated depends on several factors, including the male health, age, degree of sexual anime hentai excitement, and the time since his last ejaculation. However, various groups within society considered such depictions immoral, labelling them pornographic, and attempting to have them suppressed under obscenity laws, with varying degrees of success. These actors often play the top roles but this is not always the case, such as with Kristen Bjorn and some Bel Ami models. Additionally, the buttocks give an indication of the shape and size of the pelvis, which impacts reproductive capability. On the other hand, the masochist enjoys being hurt, humiliated, or suffering within the consensual scenario. New York photographer Irving Klaw also published illustrated adventure/bondage serials by fetish artists Eric Stanton, Gene Bilbrew, Adolfo Ruiz and others. It contains graphic momsex sexual activity and visible penetration. It is typically animated pornography, as the legal age to be featured in a pornographic film in Japan is 18. These are often fake. Sometimes one or more fingers may be inserted into the vagina to stroke its frontal wall where the G-spot may be located. A study of 164 males in Finland from two SM clubs found that 18.2% had engaged in coprophilia; 3% as a sadist, 6.1% as a masochist, and 9.1% as both. 18% of heterosexuals and 17% of homosexuals in the study pool had tried coprophilia, showing no statistically significant difference between heterosexuals and homosexuals. Urolagnia is a form of salirophilia in which sexual excitement is associated with the sight or thought of urine or urination.