Bukkake pornography involves a performer, usually female, onto whom several men or women ejaculate, usually on the face. Contrary to the other two types, B/D does not define the Tops and Bottoms itself, and is used to describe the general activities with either lesbian hentai partner being the receiver and the giver. Lolita pornography caters to ephebophiles. Particular areas and processes of the body that change during pregnancy may also become the focus of psychological investment, but nudity or sexual activity is not always essential, and in some cases actual pregnancy is not necessary to invoke arousal. Detective magazines, comic books and early fetish magazines In the early 20th century, Detective magazines covertly provided a way of publishing bondage imagery. If one person is penetrated by two objects, it is generically called double penetration . Snowballing or snowdropping is the human sexual practice in which one person takes someone else semen into his big tit milf or her mouth and then passes it to the mouth of the other, usually through kissing. Internationally, hentai is a catch-all term to describe a genre of anime and manga pornography. Solo performances in gay pornography have been described in 1985 as either or both active and/or passive , whereas female solo performances are said to be exclusively passive . Today, religions vary in their views of masturbation; some view it as a spiritually detrimental practice, some see it as not spiritually detrimental, and others gaysex take a situational view. Hermaphrodite, also known as herm, refers to pornography, typically hentai, that features persons with the genitalia of both sexes. The term is typically used by the cinematographer within the narrative framework of a pornographic film, and since the 1970s has become a leitmotif of the hardcore genre. When the interest in a particular subject is obsessive, the behavior may be described as stalking. The full-weight body-pressure, moisture, sex odors and darkness can be perceived as powerful sexual attractions or compulsions.