John Stagliano is considered to have started the gonzo pornography genre with gay twinks his Buttman series of films. Types gay hentai of anal sex can also be a part of lesbian sexual practices. A pornographic work is characterized as hardcore if it has any hardcore content, no matter how small. Foot fetishism has been defined as a pronounced sexual interest in the feet or footwear. A woman can use a secondary vibrator, between the dildo and her genitals, to get pleasure from pegging. The term bondage describes the practice of Physical restraining. A scene where many women have sex with one man is referred to as a reverse gang-bang. If one person is penetrated by two objects, it is generically called double penetration . In 1988, a sex tape caused significant damage to Rob Lowe career. The use of the word creampie to describe such scenes originated in U. Since mammary intercourse is a non-penetrative sex act, the risk of passing a sexually transmitted infection that requires direct contact between the momsex mucous membranes and pre-ejaculate or semen is greatly reduced. Commenting on why there are not as many female macrophiles, psychologist Helen Friedman theorized that because women in most societies already view men as dominant and powerful, there no need for them to fantasize about it. Pro-am pornography is sub-genre of amateur pornography that refers to professionally made porn that features amateur actors/actresses, often appearing for the first time in a pornographic film. Tentacle erotica can be consensual, but frequently contains elements of non-consensual sex. Its primary goal is sexual arousal in its audience. Diaper fetishism is totally independent from pedophilia as the wearer derives pleasure only from the diaper and/or use of it. They may be noted for using risqué themes, graphic violence, sexuality or black comedy in a manner that is unsuitable for younger audiences. The queening stool is also related to a smotherbox, which also allows the person under the seat to be locked in place, restrained by the neck as in a set of stocks.