Celebrity sex tapes are amateur or professionally-made recordings of sex acts, as performed by a celebrity and their partner. For legal reasons, the vast majority of so-called reality porn involves professional actors and actresses posing as so-called amateurs. The concept of lesbian, nude milfs to differentiate women with a shared sexual orientation, is a 20th-century construct. Depictions of male and female masturbation gay cock are common in pornography, including gay pornography. A sub-set hentai sex of vaginal fisting attempts to photograph the female cervix immediately after the fist is removed from the now-gaping vagina. Jerk off instruction features a performer encouraging or instructing the viewer to masturbate, often culminating in a countdown at the end of which the viewer is invited to induce orgasm. Voyeurism: Seeing another urinate without the person knowledge either through video taping by a hidden camera, or by lurking in locations where people are urinating or are likely to have an urge to urinate. Watersports pornography features sexual activities involving urine, such as golden showers. Adult animation is genre of animation geared towards adults and sometimes teens. 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. The scenario is a genre of erotica, which on the internet is sometimes abbreviated to CMNF, and may involve sexual and nonsexual erotic scenarios. It is suggested that much of the obscurity and the uncertainties about female ejaculation are related to mixing up these two phenomena. Most soft crush fetishists avoid being placed under the same label as hard crush fetishists, believing that crush films with larger animals give the entire group a bad label. Reality pornography is professionally made porn which seeks to emulate the style of amateur pornography. The inside of a smotherbox is often padded to provide support for their neck and prevent their head from moving.
