The first explicit pegging scene is believed to have been in the 1975 pornographic film The Opening of Misty Beethoven. Solo performances in gay pornography have been described in 1985 as either or both active and/or passive , whereas female solo performances are said to be exclusively milf xxx passive . Oral sex pornography frequently features a person performing fellatio, and less frequently cunnilingus. Barebacking usually gay cock refers to a conscious and deliberate choice to forgo condoms. Both sexes sometimes apply lubricating substances to intensify sensation. The industry generally refers to such films as adult films, which is part of adult entertainment. A study of the condom usage habits of New Zealand sex workers said that they offered various safe sex alternatives to vaginal sex to clients who refused to wear a condom. Other objects such as ball point pens and thermometers are sometimes used, although this practice can lead to injury and/or infection. Mutual masturbation, mutual manual stimulation of the genitals between partners, can be a substitute for sexual penetration. Men may also rub or massage the glans, the rim of the glans, and the frenular delta. Commenting on why there are not as many female macrophiles, psychologist Helen Friedman theorized that because women in most societies already view men as dominant and powerful, there no need for them to fantasize about it. Common phrases used to refer to these individuals are chicks with dicks or the derogatory term shemale, although these are generally considered pejorative among transwomen. A study of 164 males in Finland from two SM clubs found that 18.2% anime hentai had engaged in coprophilia; 3% as a sadist, 6.1% as a masochist, and 9.1% as both. 18% of heterosexuals and 17% of homosexuals in the study pool had tried coprophilia, showing no statistically significant difference between heterosexuals and homosexuals. They may be noted for using risqué themes, graphic violence, sexuality or black comedy in a manner that is unsuitable for younger audiences.
