Specific sex acts Anal Anal pornography features anal penetration with a penis, dildo, other objects, or some combination of them. A study of the condom usage habits of New Zealand sex workers said that videos gays they offered various safe sex alternatives to vaginal sex to clients who refused to wear a condom. Women with women Main article: Lesbianism in erotica: Lesbianism in contemporary pornography Lesbian or girl-girl pornography features women engaged in sex together, but is typically aimed at a male audience. Solo pornography recognized with AVN Awards include the All Alone series and All Natural: Glamour Solos. The existence of such content in commercially available pornography is widely considered an urban legend. Many transgender people regard the term shemale as offensive, arguing that it mocks or shows a lack of respect towards the gender porn milf identity and gender expression of transgender individuals; in this view, the term emphasizes the biological sex of a person and neglects their gender. Oral sex pornography frequently features a person performing fellatio, and less frequently cunnilingus. However, bisexual pornography is often placed near the gay section in adult video stores, since many consumers are gay men. The name was coined from the gay hentai title of the controversial book. 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. Group sex pornography features at least two men and two women , usually more, who all perform sex acts on each other. At the end of the evening the female partners would randomly select keys from the bowl and leave with that key owner. 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. Cuckolding can also be mixed with other non-monogamous relationship arrangements with which it has substantial overlap such as Swinging, wife-swapping, open relationships, and polyamory, etc.