Reflective of its views on sexuality hentai sex and culture, Japanese pornography delves into a wide spectrum of heterosexual, homosexual, and transgender sexual acts in addition to unique fetishes and philias. Softcore pornography generally contains nudity or partial nudity in sexually suggestive situations, but without explicit sexual activity, sexual penetration or extreme fetishism, while hardcore pornography may contain graphic sexual activity and visible penetration, including unsimulated sex scenes. It is commonly depicted in pornography, but very rarely in mainstream cinema. Tentacle rape or shokushu goukan is found in some horror or hentai titles, with tentacled creatures having sexual intercourse with female characters. Babysitter pornography features usually teenage girls being exploited and having taboo sex with older, male employers. One or more of the participants may engage in autoerotic sexual activity, such as masturbation, possibly without physical contact with the other participants. Real jail gay movies or prison or police station shots or videos may violate laws in some countries. Fantasies of group sex are extremely common among both men and women, and group sex is a subgenre in pornographic films. Guro or Gore is a genre of Japanese pornography involving blood, gore, disfiguration, violence, mutilation, urine, enemas, or feces. The related term twinkle-toes, which implies that a man is effeminate, tends to be used in a derogatory manner. For uncircumcised males, stimulation of the penis in this way comes from the pumping of the foreskin, in which the foreskin is held and slid up and down over the glans, which depending on foreskin milf fuck length, is completely or partially covered and then uncovered in a rapid motion. Sex experts have praised various techniques that the performer can use during fellatio to increase their partner pleasure. 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.