In the 1970s, the hardcore pornography genre introduced the stereotypical cumshot scene as a central element of the hardcore film, in which the male actor ejaculates in a way ensuring maximum visibility of the act itself. Mutual masturbation is a sexual act where gay cock two or more people stimulate themselves or one another sexually, usually with the hands. With second wave feminism and growth of scholarship in women history and sexuality in the 20th century, the definition of lesbian broadened, sparking a debate about sexual desire as the major component to define what a lesbian is. The celebrity porn surfacing of sex tapes has become so common that some are leaked as a marketing tool to advance or establish a media career. Unlike Yaoi, Bara is normally made by actual homosexual men, for homosexual men, and tends to focus on the more realistic obstacles and challenges that come with being homosexual in momsex Japan. To tea bag is a slang term f toon porn or the sexual act of a man placing his scrotum in the mouth of a willing sexual partner for pleasure or onto the face or head of another person. Various groups within society have considered depictions of a sexual nature immoral, labeling them pornographic, and attempting to have them suppressed under obscenity and other laws, with varying degrees of success. Such films continued to be produced but could only be distributed by underground channels. Facial cum shots are currently regularly portrayed in pornographic films and videos, often as a way to close a scene. Rape itself is a crime in many countries. The sub-genres usually conform to certain conventions, and each may appeal to a particular audience. Enema pornography involves adults given enemas to others, often fake. A large part of the popularity of these videos is seeing how regular and normal the girls are in real-life. The nipples are erogenous zones, and vigorous stimulation of them during masturbation usually causes the penis to become erect more quickly than it would otherwise. Especially anime hentai popular in post-World celebrity gossip War 2 Japanese culture.