Mutual naked celebrities masturbation, mutual manual stimulation of the genitals between partners, can be a substitute for sexual penetration. In 1988, a sex tape caused significant damage to Rob Lowe career. The term BDSM dates back to 1969; however, the origin of the term BDSM is unclear and is believed to have been formed either from joining the term B&D with S&M , or as a compound initialism from B&D, D&S , and S&M. It is also followed by dedicated industry publications and trade groups as well as the mainstream press, private organizations , government agencies, and political organizations. Lying face down on a comfortable surface such as a mattress or pillow, the penis can be rubbed against it. For instance, Amateur Allure has a trademark shot where the sexually performing cameraman circles a handycam momsex around the sexually performing model head. Among swinging couples, one of the two partners is often the driving force and the other is more passive-supportive of the addition of additional sex parties. Pornographic films are typically categorized as either softcore or hardcore pornography. Tentacle erotica can be consensual, but frequently contains elements of non-consensual sex. Irrespective of the legal or social view of pornography, it has been used in a number of contexts. Its primary goal is sexual arousal in its videos porno gay audience. Pregnancy fetishism is a context where pregnancy is seen by individuals or cultures as an erotic phenomenon. Snowballing or snowdropping is the human sexual practice in which one person takes someone else semen into his or her mouth and then passes it to the gay hentai mouth of naked celebrities the other, usually through kissing. Types of anal sex can also be a part of lesbian sexual practices. Particular areas and processes of the body that change during pregnancy may also become the focus of psychological investment, but nudity or sexual activity is not always essential, and in some cases actual pregnancy is not necessary to invoke arousal. Bukkake is a sex act portrayed in pornographic films, in which several men ejaculate on a woman, or another man.