Erotic gay hentai spankings are commonly combined with other forms of sexual foreplay. Drama Hardcore showed this kind of film on its film. 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. Reading or viewing pornography, sexual fantasy or other erotic stimuli may lead to a desire for sexual release such as by masturbation. 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. Swinging can take place in various contexts, ranging from a spontaneous sexual activity at an informal social gathering of friends to a regular social gathering in a sex club or residence. By comparison, gonzo pornography puts the camera right into the action, often with one or more of the participants both filming and performing sexual acts, without the usual separation between camera and performers seen in conventional porn and cinema. The preference could be barefoot, high-heels, flip flops, and so on, depending on the fetishist. This technique is also used by some men who are circumcised who have excess skin left from circumcision. The shaft skin can also be slid back and forth with just the index finger and thumb wrapped mature milfs around the penis. Reality pornography is a genre of pornography where staged scenes, usually shot in cinéma vérité fashion, set up and precede gay twinks sexual encounters. Soft swinging is when a couple engages in sexual activities with only each other while other couples perform sex acts in the immediate vicinity. A facial is a term for the sexual activity in which a man ejaculates semen onto the face of one or more sexual partners. The consensual submission of the submissive is sometimes demonstrated to others by symbols indicating his/her belonging to the dominant, such as wearing a collar, special tattoos, piercings, a very short haircut or a bald head.