Pregnancy fetishism is a context where pregnancy is seen by individuals or cultures as an erotic phenomenon. Usually that person prefers to stage the wetting so that his/her legs become soaked with urine. Interracial pornographic films have experienced an explosion in popularity, becoming one of the fastest-growing and biggest-selling genres. Hentai is the various forms of Japanese pornography, including H-manga, H-anime, and H-computer games. Snuff pornography involves the actual death of any of the participants, consenting or otherwise, simulated death is not considered snuff. Omorashi: The act of holding one own urine until the need to urinate is urgent, making another hold in their urine, or watching another person with an urgent need to urinate. Going back at least as far as the Christy twins in the 1970s, depictions of incest and particularly incest between twins has been a feature of gay pornography. This category also includes pornographic home movies. Shemale is a term primarily used in sex work to describe a trans woman with male genitalia combined with female secondary sex characteristics, usually including augmented female breasts, from breast augmentation and/or use of hormones. A somewhat controversial ejaculation control technique is to put pressure on the perineum, about halfway between the scrotum and the anus, nude milfs just before ejaculating. Pegging is a sexual practice in which a woman performs anal sex on a man by penetrating the man anus with a strap-on dildo. Emetophilia pornography hot gay sex involving vomiting and gagging. When he is in position the cover is closed. For legal reasons, the vast majority of so-called reality porn involves professional actors and actresses posing as so-called amateurs. Matsuo used amateur actresses in his videos, and he usually traveled to their hometowns for the filming. Individuals are also sometimes abbreviated when referred to in writing, so a dominant person may be referred to as a Dom for a man, and a Domme for a woman. The term discipline describes psychological restraining, with hentai videos the use of rules and punishment to control overt behavior.