As with most forms of sexual activity, anal sex participants risk contracting sexually transmitted infections . Teacher and Student or Boss and Secretary pornography involves sexualized situations which momporn take place between an authority figure, such as a teacher or boss, and an underling, such as a student or secretary, often fake. Cum-shot pornography features a collection of male ejaculation scenes. Bareback sex is physical sexual activity, especially sexual penetration, without the use of a condom. Crying pornography that features participating actors crying. Guro or Gore is a genre of Japanese pornography involving blood, gore, disfiguration, violence, mutilation, urine, enemas, or feces. Reality Reality pornography refers to real or faked amateur encounters. This technique may include the use of a simulacrum, or artificial vagina. Amateur porn has been called one of the most profitable and long-lasting genres of pornography. Pleasure for the giver during anilingus is usually based more on the principle of the act. This category also includes pornographic home movies. In recent years, Japanese films of this genre have become more common in the USA and Europe although it still remains a small, fetish-oriented part of the adult film industry. Gonzo porn is influenced by amateur pornography, and it tends to use far fewer full-body/wide shots in favor of more close-ups . He talked to them extensively on camera so that both he and the viewer can come to know them before any sex scenes. Bukkake pornography usually videos porno gay depicts numerous men having sex with one woman, with multiple, usually 10 or more, men ejaculating on the female face. Especially popular in post-World War 2 Japanese culture. In places where non-monogamous sex is taboo or illegal, group sex may take place in private or hentai sex clandestine locations including homes, hotel rooms, or private clubs. The first pegging scene appears to have been in the non-pornographic 1970 film Myra Breckinridge, based on the novel of the same name by Gore Vidal, although it was not explicit.