Cartoon pornography is the portrayal of illustrated or animated fictional momporn characters in erotic or sexual situations. This makes varying degrees of stimulation an integral part of oral sex for many men. Mammary intercourse is known as titty-fucking, titfuck, or a titjob in the United States, as well as tit wank or French fuck in the United Kingdom - the latter term dating back to the 1930s; while a more jocular equivalent is a trip down mammary lane. A lesbian is a female homosexual; a female who experiences romantic love or sexual attraction to other females. Mutual masturbation foreplay The manual stimulation of each other genitals where the session eventually leads to sexual intercourse. The volume of semen that is ejaculated depends on several factors, including the male health, age, degree of sexual excitement, and the time since his last ejaculation. The term is typically used by the cinematographer within the narrative framework of a pornographic film, and since the 1970s has become a leitmotif of the hardcore genre. They may be noted for using risqué themes, graphic violence, sexuality or black comedy in a manner that is unsuitable for younger audiences. They may regard it as an enhancing element of their sex lives or as their primary form of sexual activity. Felching is a sexual practice involving the act of orally sucking semen out of the vagina or anus of one partner. Most bisexual porn is made by small production companies rather than the major studios. Following the introduction of the Motion Picture Association of America film rating system, independent animation producers attempted to establish an alternative to mainstream animation. A scene where many women have sex with one man is referred to as a reverse gang-bang. Lolita pornography caters to ephebophiles. It is the most common form of sexual fetishism for hentai porn otherwise non-sexual objects gaysex or body parts. In some creampie films, both gay and straight, intercourse and internal ejaculation are followed by performers licking up the semen that has dripped from their bodies.