Transsexual pornography is a genre of pornography. 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. 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. Shibari is a Japanese word that literally means to tie or to bind. Men may find stimulation of the anus, rectum, and adjacent organs enjoyable. Many men who like trans partners of any variety, known as tranny chasers, do not necessarily identify as gay themselves. Bondage/BDSM Bondage pornography features performers tied up or constrained in various ways. This can, however, redirect semen into the bladder . These scenes may involve the female actor calling for the shot to be directed at some specific part of her body. Female ejaculation is the expulsion of fluid by the paraurethral ducts through and around the human female urethra during or before an 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. For legal reasons, the vast majority of so-called reality porn involves professional milf fuck actors and actresses posing as so-called amateurs. Often, strong views are expressed with regard to anal sex; it is controversial in various cultures, especially with regard to religion, gay cock commonly due to prohibitions against anal sex among gay men or teachings about the procreative purpose of sexual activity. Lucky Pierre is slang for a person performing both receptive and insertive anal and/or vaginal sex simultaneously during a threesome, being positioned between the two partners. The other 3d hentai person may do the same during or after. Sexologist Alfred Kind suggested that the buttocks is the primary sexual presentation site in primates.