Related genres include: Amateur pornography originally referred only to pornography produced by amateurs but now also includes professionally made pornography designed to appear as if it were amateur. This style of filming is in contrast to having a separate, third-person camera crew filming all the action. Anal sex or anal intercourse is generally the insertion and thrusting of the erect penis into a person anus, or anus and rectum, for sexual pleasure. The term soft crush refers to the more common fetish surrounding videos involving inanimate objects or small invertebrates being crushed, while the term hard crush refers to such videos involving larger animals with vertabrae, and arguably more pain-susceptible animals . Ethnic pornography is a genre of pornography that features performers of specific ethnic groups, or depictions of interracial sexual activity. It may also involve touching, rubbing, or pinching the nipples or other erogenous zones while masturbating. The 1979 U. This is why video stores might consider stocking transgendered subject matter in the straight section, as some straight men will have passive or active sex with another man as long as their partner appears to look like a woman to them, to some minor or major degree. By Japanese law, the genitals of actors and actresses must be censored and up the mid-1990 so was the depiction of pubic hair. Pornographic films present sexual fantasies and usually include erotically stimulating material such as nudity. As with most forms of sexual momporn activity, anal hentai videos sex participants risk contracting sexually transmitted infections . Cum-shot pornography features gaysex a collection of male ejaculation scenes. Watersports pornography features sexual activities involving urine, such as golden showers. Pornographic films or sex films are films that present sexually explicit subject matter for the purpose of sexual arousal and erotic satisfaction of the viewer. Along with the penis, the scrotum is sensitive and considered to be an erogenous zone.