Hentai is the various forms of Japanese pornography, including H-manga, H-anime, and H-computer games. As in B/D, the declaration of the Top/Bottom may be required, though sadomasochists may also play without any Power Exchange at all, with both partners equally in control of the play. Pornography is generally classified as either softcore or hardcore pornography. Sadomasochism does not imply enjoyment through causing or receiving pain in other situations . Unlike the traditional definition of the term, in fetish usage a cuckold is complicit in their partner sexual infidelity and takes masochistic sexual pleasure in it. The person sat upon may be in bondage, gay twinks sexually submissive, or simply held down by the body-weight of the other person. 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. Such films continued to be produced but could only be distributed by underground channels. Men and women may masturbate until they are close to orgasm, stop for a while to reduce excitement, and then resume masturbating. Emetophilia pornography involving vomiting and gagging. Group sex is sexual behavior involving more than two participants. Lesbian anime hentai pornography made for women is usually made by women, and usually features women who identify as lesbian or bisexual. Sometimes special furniture is used, such as a queening stool milf xxx or smotherbox. It may be used as foreplay, or as an alternative to sexual penetration. Amateur porn has been called one of the most profitable and long-lasting genres of pornography. Facial cum shots are currently regularly portrayed in pornographic films and videos, often as a way to close a scene. Snuff pornography involves the actual death of any of the participants, consenting or otherwise, simulated death is not considered snuff. Reflective of its views on sexuality and culture, Japanese pornography delves into a wide spectrum of heterosexual, homosexual, and transgender sexual acts in addition to unique fetishes and philias.