See Gay-for-pay. Others involve partners who naturally have videos gays a significant difference in size. The terms can be complimentary horny milfs or pejorative. Failure to honor a safeword is considered serious misconduct and could even change the sexual consent situation into a crime, depending on the relevant law, since the bottom has explicitly revoked his or her consent to any actions that follow the use of the safeword . 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. But starting with The World Biggest Gangbang , starring Annabel Chong, the pornographic industry began producing a series of films ostensibly setting gangbang records for most consecutive sex acts by one person in a short period. A male voyeur is commonly anime hentai labeled Peeping Tom, a term which originates from the Lady Godiva legend. Sadomasochism does not imply enjoyment through causing or receiving pain in other situations . 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. Group sex can occur between people of all sexual orientations and genders. It may involve sexual attraction to women who are pregnant or appear pregnant, attraction to lactation, or attraction to particular stages of pregnancy such as impregnation or childbirth. Anal sex or anal intercourse is generally the insertion and thrusting of the erect penis into a person anus, or anus and rectum, for sexual pleasure. Twink pornography features younger performers, and usually features young men under 30 who identify as gay or bisexual. When sexual activity is centered on one of the threesome, then the activity may be described as a gang bang of the person. Although pornography has usually focused on heterosexuality, due to the prevalence of the heterosexual orientation, explicit gay material has a long history as well, which reaches back to Greek antiquity, if not to prehistory.