The industry generally refers to such films as adult films, which is part of adult entertainment. In Japanese, the term describes any type of perverse or bizarre sexual desire or act; it does not represent a genre of work. The Girls Gone Wild series is one example. The cover can have hinges or be a separate part. Contrary to the other two types, B/D does not define the Tops and Bottoms itself, and is used to describe the general activities with either partner being the receiver and the giver. Cartoon pornography is the portrayal of illustrated or animated fictional characters in erotic or sexual situations. Cartoon pornography includes, but hentai porn is not limited to, hentai and parody renditions of famous cartoons and comics. The warm sensation felt when urine trickles on the body seems to give very relaxing and pleasurable feelings to the person. The genre presents itself as real couples having real sex. The resulting consent and understanding is occasionally summarized in a written videos gays contract, which is an agreement of what can and cannot take place. Medical pornography involves sexualized medical, often fake, including gynecological pelvic examinations, rectal examinations, and pelvic or gynecological ultrasounds. Pantyhose/Tights/Stockings pornography involves women or men dressed in pantyhose, tights, or stockings. Swinging can take place in various contexts, ranging from a spontaneous sexual activity at lesbian milfs an informal social gathering of friends to a regular social gathering in a sex club or residence. In some creampie films, both gay and straight, intercourse and internal ejaculation are followed by performers licking up the semen that has dripped from their bodies. The fantasy is typically based around one or more larger beings dominating a smaller being. As well as traditional attraction, the topic also incorporates feederism and gaining, where sexual gratification is obtained via the process of gaining body fat. Since mammary intercourse is a non-penetrative sex act, the risk of passing a sexually transmitted infection that requires direct contact between the mucous membranes and pre-ejaculate or semen is greatly reduced.