Some masturbate only using pressure applied to the clitoris without direct contact, for example by pressing the palm or ball of the hand against underwear or other clothing. The full-weight body-pressure, moisture, sex odors and darkness can be perceived as powerful sexual attractions or compulsions. Detective magazines, comic books and early fetish magazines In the early 20th century, Detective magazines covertly provided a way of publishing bondage imagery. Coprophilia , also called scatophilia or scat , is the paraphilia involving sexual arousal and pleasure from feces. In POV porn, the shooting style is generally similar to gonzo pornography, with the person receiving sexual gratification holding the camera him or herself—aiming it down at the actress or actor who is performing the sex act. The industry generally refers to such films as adult milf fuck films, which is part of adult entertainment. A related term used in the genre is the term cougar, which implies an older woman as predator. Those with diaper-related paraphilias differ widely in their focus of attention. Sexual orientation Pornography features an increasing variety of combinations of actors by their sexual orientation such as lesbian, gay, bisexual, and transsexuals in addition to traditional heterosexual roles. Other fetish Bareback pornography features performers who are not wearing condoms. Pornography may fall into more than one genre. There are number of types of sex parties: Swinger party/gathering A swinger party or partner-swapping party is a gathering at which individuals or couples in a committed relationship can engage in sexual activities with others as a recreational or social activity. Hermaphrodite, also known as herm, refers to pornography, typically hentai, that hentai porn features persons with the genitalia of both sexes. Yaoi is anime or manga that young gay porn features gay males . There are various subcultures under this umbrella term and distinct difference between these subcultures. Interactive pornography, available in CD-ROM and DVD format, allows the viewer to select the particular acts performed at any one time, sometimes with the camera providing a first person view.