Within a BDSM or D/s context, facesitting can be an especially intense form of erotic humiliation. It may also involve touching, rubbing, or pinching the nipples or other erogenous zones while masturbating. Some actors who are actually gay or bisexual will be marketed as straight to appeal to the allure of the unattainable, because straight men are virgins to sex with other men, and as in most gay male settings, the young, the muscular, and the unfamiliar are more sought.. Each participant may engage in any type of sex acts with one or both of the others, such as vaginal, anal or oral sex or mutual masturbation. Actual spying may violate privacy and/or trespassing laws in many countries. Body parts including fingers, tongue and penis may be used for anonymous oral, vaginal and/or anal intercourse. Some productions are noted for sophisticated and/or experimental storytelling and animation techniques. Sex experts have praised various techniques that the performer can use during fellatio to increase their partner pleasure. In some societies, the terms fox, plum, gay hentai chick, or chicken are preferred. Fantasies of group sex are extremely common among both men and women, and group sex is a subgenre in pornographic films. Group sex can occur between people of all sexual orientations and genders. Crying pornography that features participating actors crying. Rough sex pornography is similar to pornography featuring sadomasochism, and typically features a Top who humiliates and/or degrades a Bottom while being physically violent towards them. Amateur porn has been called one of the most profitable and long-lasting genres of pornography. Targets the male audience, but is much gaysex less popular than Yaoi. Mutual masturbation is a sexual act where two or more people momsex stimulate themselves or one another sexually, usually with the hands. While bondage is a very popular variation within the larger field of BDSM, it is nevertheless sometimes differentiated from the rest of this field. Many men who like trans partners of any variety, known as tranny chasers, do not necessarily identify as gay themselves.