However, various groups within society considered such depictions immoral, labelling them pornographic, and attempting to have them suppressed under obscenity laws, with varying degrees of success. Some aspects of the research community distinguish between female ejaculation and what is colloquially known as squirting anime hentai or gushing. Examples of mentally oriented practices are education games, during which the dominant requires certain forms of behavior from the submissive. In general, as compared to conventional relationships, BDSM participants go to great lengths to negotiate the important aspects of their relationships in advance, and to take great care in learning about and following safe practices. Standing up, a chair, the corner of an item of furniture, or even a washing machine can be used to stimulate the clitoris through the labia and clothing. Some men enjoy masturbating during pegging. Medical pornography involves sexualized medical, often fake, including gynecological pelvic examinations, rectal examinations, and pelvic or gynecological ultrasounds. Instead, all five fingers are kept straight and held as close together as possible , then slowly inserted into a well lubricated vagina or rectum. 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. The fantasy is typically based around one or mature milfs more larger beings dominating a smaller being. Mutual masturbation foreplay The manual stimulation of each other gay fuck genitals where the session eventually leads to sexual intercourse. 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. In the gay pornography industry, which uses amateurs as well as professional actors, the term gay-for-pay refers to actors labeled or believed to be straight but who engage in same-sex sexual activities for money.