Pornographic films present sexual fantasies and usually include erotically stimulating material such as nudity. Unlike Yaoi, Bara is normally made by actual homosexual men, for homosexual men, and tends to focus on the more realistic obstacles and challenges that come with being homosexual in Japan. The anus has a relatively high concentration of nerve endings and can be an erogenous zone, and the receiver may receive pleasure from external anal stimulation. When sexual activity is centered on one of the threesome, then the activity may be described as a gang bang of the person. Body parts including fingers, tongue and penis may be used for anonymous oral, vaginal and/or anal intercourse. Targets the male audience, but is much less popular than Yaoi. Strictly speaking, bondage means binding the partner by tying their appendages together; for example, by the use of handcuffs or by lashing their arms to an object. The stimulation may involve hands, fingers, everyday objects, sex toys or combinations of these. In the 1970s, the hardcore pornography genre introduced the stereotypical cumshot scene as a central element of the hardcore film, in which the male actor ejaculates in a way ensuring maximum visibility of the act itself. Greater economic and social freedom allowed them gradually to be able to determine how they could form relationships and families. Sexual scenarios horny milfs may involve male domination, female submission, exhibitionism and erotic entertainment. Rough sex pornography is similar to pornography featuring sadomasochism, and typically features a Top who anime hentai humiliates and/or degrades a Bottom while being physically violent towards them. Guro or Gore is a genre of Japanese pornography involving blood, gore, disfiguration, violence, mutilation, urine, enemas, or feces. Some restrict a policy of panties/nipple tape for videos porno gay females and some allow full nudity with explicit sexual interaction allowed. Especially popular in post-World War 2 Japanese culture. Snuff pornography involves the actual death of any of the participants, consenting or otherwise, simulated death is not considered snuff.