Clothed female, naked male pornography features naked men and clothed women; typically, the women humiliate and abuse the men or perform fellatio and/or handjobs on the men. Some pornographic films use an artificial semen substitute to simulate or enhance creampie shots. Lying face down on a comfortable surface such as a mattress or pillow, the penis can be rubbed against it. Sexual orientation Pornography features an increasing variety of combinations of actors 3d hentai by their sexual orientation such as lesbian, gay, bisexual, and transsexuals in addition to traditional heterosexual roles. Other objects such as ball point pens and thermometers are sometimes used, although this practice can lead to injury and/or infection. Some straight actors have started acting in gay porn only to be accused of being gay while others first step was to strictly do solo scenes. For circumcised males, on whom the glans is mostly or completely uncovered, this technique creates more direct contact between the hand and the glans. In 1988, a sex tape caused significant damage to Rob Lowe career. The existence of naked milf such content in commercially available pornography is widely considered an urban legend. A study of the condom usage habits of New Zealand sex workers said that they offered various safe sex alternatives to vaginal sex to clients who refused to wear a condom. Examples of mentally oriented practices are education games, during which the dominant requires certain forms of behavior from the submissive. In humans, females generally have more round and voluptuous buttocks, caused by estrogen that encourages the body to store fat in the buttocks, hips, and thighs. Barebacking usually refers to a conscious and deliberate choice to forgo condoms. It is typically animated pornography, as the legal age to be featured in a pornographic film in Japan is 18. Tentacle erotica can be consensual, but frequently contains elements of non-consensual sex. By comparison, gonzo pornography puts the camera right into the action, often with one or more of the participants both filming and performing gay fuck sexual acts, without the usual separation between camera and performers seen in conventional porn and cinema.