Patricia Hill Collins, an African-American writer, theorizes that this is derived from a stereotype that those of black descent are promiscuous, and their buttocks are objectified by porn as a result. In these research publications, it is suggested that real female ejaculation is the release of a very scanty, thick, and whitish fluid from the female prostate, while the squirting or gushing shown frequently in pornography is a different phenomenon, the expulsion of clear and abundant fluid, which has been shown to be a diluted fluid from the urinary bladder. Certain websites have begun providing bondage videos and photographs featuring the kidnapping roleplay, which has been largely the hallmark of detective style bondage gay bear porn magazines. Crush pornography features objects being crushed by an actress or actor, who generally plays an overtly dominant role. The name was coined from the title of the controversial book. The act may be carried out face to face, or head to tail, with the woman recommended to be on top if she has smaller breasts. Sigmund 3d hentai Freud considered foot binding as a form of fetishism. Gay pornography is the representation of sexual activity between males. 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. Those with diaper-related paraphilias big tit milf differ widely in their focus of attention. 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. Some people get sexual pleasure by inserting objects, such as urethral sounds, into the urethra , a practice known as urethral play or sounding. Today, pornographic films can be sold or rented on DVD, shown through Internet and special channels and pay-per-view on cable and satellite, and in adult theaters. 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.