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. Works in this genre may explore philosophical, political or social issues. Gonzo pornography hentai sex is a style of pornographic film naked milf that attempts to place the viewer directly into the scene. Voyeur pornography may also include shots of topless women on topless beaches who are unaware of the cameras but may legally be photographed due to the public setting. People may experience pleasure from anal sex by stimulation of the anal nerve endings, and orgasm may be achieved through anal penetration – by indirect stimulation of the prostate in men, indirect clitoral/G-spot stimulation in women, and associated sensory nerves . Mutual masturbation foreplay The manual stimulation of each other genitals where the session eventually leads to sexual intercourse. Group sex also occurs in populations of non-human animals such as bonobo apes and chimpanzees. Many transgender people regard the term shemale as offensive, arguing that it mocks or shows a lack of respect towards the gender identity and gender expression of transgender individuals; in this view, the term emphasizes the biological sex of a person and neglects their gender. 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. During anal sex, male pleasure hot gay sex can be particularly derived from the prostate, which can lead to an orgasm and ejaculation. The activity is done by itself or as a part of or prelude to other activities which many times involve sex. For some people, non-penetrative sex is the primary sexual activity of choice above all others. See also Gay-for-pay. Masturbation is the self-sexual stimulation of the genitals for sexual arousal or other sexual pleasure, usually to the point of orgasm. Such grounds and even the definition of pornography have differed in various historical, cultural, and national contexts.