Along with the penis, the scrotum is sensitive and considered to be an erogenous zone. They may repeat this cycle multiple times. Pegging is a recently invented word which features a woman penetrating momsex a man with a strap-on dildo. In some areas, there are laws stating it is not legally possible to consent to be killed, and elsewhere it may still be legally dubious . The Japanese sex industry uses the term Paizuri . In pornography, depictions of lesbian sex form a popular subgenre, directed toward a male heterosexual and female homosexual audience. The effect is to give the viewer the sense that they are experiencing the sex acts that they are watching, as opposed to simply watching others as a voyeur. Erotic spanking is the act of spanking another person for the sexual arousal or gratification of either or both parties. Technically this is a form of exhibitionism rather than group sex per se. The nipples are erogenous zones, and vigorous stimulation of them during masturbation usually causes the penis to become erect more quickly than it would otherwise. Felching involves drinking recently ejaculated semen from the vagina or anus. Fistees who are more experienced may take two fists . Bareback sex is physical sexual activity, especially sexual penetration, without the use of a gay cock condom. The interaction between tops and bottoms—where physical or mental control of the bottom is surrendered to the top—is sometimes known as power exchange, whether in the context of an encounter or a relationship. It is also often mixed with other fetishes hentai movies in practice, such as voyeurism, denial, etc. Sexual scenarios may involve male domination, female submission, exhibitionism and erotic entertainment. Fantasies of group sex are extremely common among both men and women, and group sex is a subgenre in pornographic films. Bondage is usually, but not always, a sexual practice. Sometimes, asymmetric and often intentionally uncomfortable positions are employed to heighten the psychological impact of the bondage.