Along with the penis, the scrotum is sensitive and considered to be an erogenous zone. Well-known female porn stars who expressed their pleasure in pegging their male partners include Taylor Wane, Debi Diamond, Brittany Andrews, and Monique Covét. A celebrity may allow such a recording to surface willingly, as part of a publicity stunt. Going back at least as far as the Christy twins in the 1970s, depictions of incest and particularly incest between twins has been a feature of gay pornography. 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. Clothed female, naked male is a genre of erotica featuring one or more naked milf nude gay boy porn men and one or more clothed women. Pornography is generally classified as either softcore or hardcore pornography. 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. As with most forms of sexual activity, anal sex participants risk contracting sexually transmitted infections . It spawned numerous sequels, several of hentai movies which won adult film awards. Watersports pornography features sexual activities involving urine, such as golden showers. Pornography in the early 2000s. A facial is a form of non-penetrative sex, though it is generally performed after some other means of sexual stimulation, such as vaginal sex, anal sex, oral sex or masturbation. 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. Men and women may masturbate until they are close to orgasm, stop for a while to reduce excitement, and then resume masturbating. These scenes may either have the cameraman directly engaging in sex or merely filming others having sex.