In these research publications, it is suggested that real female ejaculation is the release of a very scanty, thick, and whitish fluid from the female prostate, while the squirting or gushing shown frequently in pornography is a different phenomenon, the expulsion of clear and abundant fluid, which has been shown to be a diluted fluid from the urinary bladder. While some fantasize about a giantess who is slightly lesbian milfs taller than himself, others are interested in giantesses that are hundreds or even thousands of feet tall. The most successful animated features produced in the United States primarily for adult gay bear porn audiences were directed by Ralph Bakshi, including Fritz the Cat, Heavy Traffic and Coonskin. Some are aroused from wetting their diapers, others like messing their diapers. The term has origins in the Greek language . Group sex pornography features at least two men and two women , usually more, who all perform anime hentai sex acts on each other. 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. A lesbian is a female homosexual; a female who experiences romantic love or sexual attraction to other females. Some people get sexual pleasure by inserting objects, such as urethral sounds, into the urethra , a practice known as urethral play or sounding. The industry generally refers to such films as adult films, which is part of adult entertainment. A person may be sexually penetrated multiple times simultaneously. 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 term breast fetishism is also used to refer to cultural attention to female breasts and the sexuality they represent, with debate continuing as to whether the modern widespread fascination with breasts among heterosexual males in western societies is a sexual fetish.