Gonzo porn is influenced by amateur pornography, and it tends to use far fewer full-body/wide shots in favor of more close-ups . In some societies, the terms fox, plum, chick, or chicken are preferred. The related term twinkle-toes, which implies that a man milf xxx is effeminate, tends to be used in a derogatory manner. Mutual masturbation is a sexual act where two or more people stimulate themselves or one another sexually, usually with the hands. Mammary intercourse is said by Alex Comfort to produce mutual orgasm in women with sensitive breasts , and it was one of the nine substitute exercises for penetrative sexual activities, as detailed in the Paradis Charnels of 1903. Shemale is a term primarily used in sex work to describe a trans woman with male genitalia combined with female secondary sex characteristics, usually including augmented female breasts, from breast augmentation and/or use of hormones. Body parts including fingers, tongue and penis may be used for anonymous oral, vaginal and/or anal intercourse. Snuff pornography involves the actual death of any of the participants, consenting or otherwise, simulated death is not considered snuff. Men and women may masturbate until they are close to orgasm, stop for a while to reduce excitement, and then resume masturbating. A variant of this is known as ATOM or ATOGM where the insertive partner removes his penis from one recipient anus and inserts it into a second recipient mouth. Sadomasochism does not imply enjoyment through causing or receiving pain in other situations . Making a pearl necklace is one of the activities that sex workers use as safe sex alternatives for people who refuse to wear condoms. A common way that these are depicted in a single scene is with one woman and two men performing together. In September 2003 the BBC reported on the gay hentai new dogging craze. The higher pay gay bear porn scale and profile within a production often leads to group scenes where a straight actor only tops. Consent is the most important criterion here.