Other objects such as ball point pens and thermometers are sometimes used, although this practice can lead to injury and/or infection. Women who perform in lesbian pornography often do not consider themselves lesbian or bisexual. They further argue that setting a discrete line between safe and not-safe activities ideologically denies consenting adults the right to evaluate risks vs rewards for themselves; that some adults will be drawn to certain activities regardless of the risk; and that BDSM play—particularly higher-risk play or edgeplay—should be treated with the same regard as extreme sports, with both respect and the demand that practitioners educate themselves and practice the higher-risk activities to decrease risk. Use of the agreed safeword is seen by some as an explicit withdrawal of consent. Usually that person prefers to stage the wetting so that his/her legs videos porno gay become soaked with urine. A somewhat controversial ejaculation control technique is to lesbian hentai put pressure on the perineum, about halfway between the scrotum and the porn milf anus, just before ejaculating. In Japanese, this natural-fibre rope is known as asanawa; the Japanese vocabulary does not make a distinction between hemp and jute. Real medical shots or videos may violate privacy laws in some countries. 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. Pornography is often distinguished from erotica, which consists of the portrayal of sexuality with high-art aspirations, focusing also on feelings and emotions, while pornography involves the depiction of acts in a sensational manner, with the entire focus on the physical act, so as to arouse quick intense reactions. Starting with erotic stories and woodblock prints from before the 20th century, Japanese pornography evolved into distinct subcategories with the media that in addition of pornographic videos and magazines featuring live actors, there is exist categories of pornographic manga , pornographic computer games , and pornographic anime .