The resulting consent and understanding is occasionally summarized in a written gay bear porn contract, which is an agreement of what can and cannot take place. Bear features a combination of middle-aged, hairy or overweight males. Following World War II, during a period of social repression when governments actively persecuted homosexuals, women developed networks to socialize with and educate each other. The cover can have hinges or be a separate part. 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. Yaoi is anime or manga that features gay males . They may regard it as an enhancing element of their sex lives or as their primary form of sexual activity. Mammary intercourse is known as titty-fucking, titfuck, or a titjob in the United States, as well as tit wank or French fuck in the United Kingdom - the latter term dating back to the 1930s; while a more jocular equivalent is a trip down mammary lane. Threesome or 3some pornography features one man and two women . In humans, females generally horny milfs have more round and voluptuous buttocks, caused by estrogen that encourages the body to store fat in the buttocks, hips, and thighs. Most bisexual porn is made by small production companies rather than the major studios. This type of pornography is almost exclusively hentai, as true hermaphroditic anime hentai humans are not fertile and are not usually found in nature. Breast fetishism is a paraphilic sexual interest focused on female breasts . See also Gay-for-pay. 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. In POV porn, the shooting style is generally similar to gonzo pornography, with the person receiving sexual gratification holding the camera him or herself—aiming it down at the actress or actor who is performing the sex act.
