Works in this genre may be considered adult for any number of reasons. Yuri : Featuring two grown adult women in a homosexual/lesbian relationship. It contains graphic sexual activity and visible penetration. 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 term is typically used by the cinematographer within the narrative framework of a pornographic gay movies film, and since the 1970s has become a leitmotif of the hardcore genre. Bear features a combination of middle-aged, hairy or overweight males. In the fetish cuckolding subculture, it is most common for the female to take on the sexually dominant role and the male the submissive role, however, female subs, sometimes referred to as cuckqueans, also exist. Bukkake is a sex act portrayed in pornographic films, in which several men ejaculate on a woman, or another man. Some people get sexual pleasure by inserting objects, such as urethral sounds, into the urethra , a practice known as urethral play or sounding. It is geared towards heterosexual men, who most typically define a threesome as such. Breast fetishism is a paraphilic sexual interest focused on female breasts . Patricia Hill Collins, an African-American writer, theorizes that this is derived from a stereotype that those of black descent are promiscuous, and their buttocks are objectified by porn as a result. 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 partner being the receiver and the giver. Other objects such as ball point pens and thermometers are sometimes used, although this practice can lead to injury and/or infection. Hentai narrow Japanese usage and broad international usage are often incompatible. Pro-am pornography is sub-genre of amateur pornography that refers to professionally hentai movies made porn that features amateur actors/actresses, often big tit milf appearing for the first time in a pornographic film.
