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. Diaper fetishism, nappy fetishism or diaperism, is a sexual fetish in which a person feels a desire to wear or use diapers. A person hentai porn may be sexually penetrated multiple times simultaneously. There are various subcultures under this umbrella term and distinct difference between these subcultures. In Japan, point of view pornography is referred to as hamedori . Rubber pornography involves rubber, latex, and similar materials. The shaft skin can also be slid back and forth with just the index finger and thumb wrapped around the penis. Nevertheless, it is only an attempt at phenomenological differentiation. People may also find masturbating with friends helps lift the stigma they feel surrounding the act. Rimjob pornography centers around anilingus. A pornographic work is characterized as hardcore if it has any hardcore content. For a foot fetishist, points of attraction include the shape and size of the foot and toes , jewelry , treatments , state of dress , odor, and sensory interaction . The term has origins in the Greek language . Voyeurism is the sexual interest in or practice of spying on people engaged in intimate behaviors, such as undressing, sexual activity, or other actions usually considered to be of a private nature. Some people masturbate gaysex by using machines that simulate intercourse. A celebrity sex tape is typically an amateur pornographic video recording involving one or more celebrity milf fuck famous person which has, intentionally or unintentionally, been made available publicly. Group sex also occurs in populations of non-human animals such as bonobo apes and chimpanzees. Breast fetishism is a paraphilic sexual interest focused on female breasts .