Solo pornography recognized with AVN Awards include the All Alone series and All Natural: Glamour Solos. A person may be sexually penetrated multiple times simultaneously. Such grounds and even the definition of pornography have differed in various historical, cultural, and national contexts. Being forced to wear diapers as a form of humiliation is sometimes a behavior encountered in sexual masochism. Typically features adult, masculine men with varying degrees of muscle, body fat, and body hair, akin to beefcakes, or bears. The fantasy is typically based around one or more larger beings dominating a smaller being. Exhibitionism: Becoming noticeably desperate or wetting oneself with the express purpose of being seen by strangers. 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 . Internal ejaculation shots are a comparatively recent development in pornography; they mature milfs are not found in early pornographic films. Foot fetishism has been defined as a pronounced sexual interest in the feet or footwear. Although there may be no connection between coprophilia and sadomasochism , the limited data on the former gay cock comes from studies of the latter. Ass to mouth is a slang term primarily used to describe the withdrawal of a penis from the receptive partner anus followed by the immediate insertion into the receptive partner mouth. The neologism pegging was popularized when it became the winning entry in a contest in Dan Savage Savage Love sex advice column, held after an observation was made that there was no common name for the act. Macrophilia is a fascination with or a sexual fantasy involving giants, more commonly expressed hentai sex as giantesses . 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.