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 upskirt or downblouse shots may violate privacy laws in some countries. It is sometimes described as a sexual fantasy, by women or men, depicting an exhibitionist or physique worship scenario. The anus has a relatively high concentration of nerve endings and can be an erogenous zone, and the receiver may receive pleasure from external momsex anal stimulation. Gay-for-pay describes male or female actors, pornographic stars, or sex workers who self-identify as heterosexual but who are paid to act or perform as homosexual professionally. Female ejaculation is the expulsion of fluid by the paraurethral ducts through and around the human female urethra during or before an orgasm. 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 . Examples include the Girls Gone Wild and Girls Who Like Girls Series. The definition clash also appears with the English definition of yuri as any lesbian relationship, as opposed to its sexually explicit definition in Japan. Babysitter pornography features usually teenage girls being exploited and anime hentai having taboo sex with older, male employers. The term soft crush refers to the more common fetish surrounding videos involving inanimate objects or small invertebrates being crushed, while the term hard crush refers to such videos involving larger animals with vertabrae, and arguably more pain-susceptible animals . But starting with The World Biggest Gangbang , starring Annabel Chong, the pornographic gaysex industry began producing a series of films ostensibly setting gangbang records for most consecutive sex acts by one person in a short period. Pregnancy fetishism is a context where pregnancy is seen by individuals or cultures as an erotic phenomenon.