Typically featured are hitting, choking, name-calling and hair-pulling. It is also known colloquially as gay movies gushing or squirting, although these are considered to be different phenomena in some research publications. Foot fetish pornography features heavy emphasis on the feet of the participants, either in combination with kissing and genital sex or in the context big tit milf of acts such as trampling or crush fetishism. Pornographic films are typically categorized as either softcore or hardcore pornography. Men may also rub or massage the glans, the rim of the glans, and the frenular delta. Sadomasochism is practiced in isolation relatively rarely, though some masochists report biting, pinching, or even stun-gunning themselves as a prelude to, or as part of, masturbation. Concerted deployed sexual hentai porn rejection exercised on the partner can be an aspect of Dominance and Submission as well. This can, however, redirect semen into the bladder . Cuckold fetish pornography that involves a cuckolded husband. Mammary intercourse is a sex act, performed as foreplay or as non-penetrative sex, that involves the stimulation of the male penis by the female breasts and vice versa. Internal ejaculation shots are a comparatively recent development in pornography; they are not found in early pornographic films. 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 use of the word creampie to describe such scenes originated in U. This stop and go build-up, known as edging, can achieve even stronger orgasms. The term sadomasochism is derived from the words sadism and masochism . Transsexual pornography is a genre of pornography. Bukkake is a sex act portrayed in pornographic films, in which several men ejaculate on a woman, or another man. The object or situation of interest is called the fetish; the person who has a fetish for that object/situation is a fetishist. Hamedori is a genre of Japanese pornography in which a male adult video actor or director serves as the camera operator.