Depictions of male and female masturbation are common in pornography, including gay pornography. Some restrict a policy of panties/nipple tape for females and some allow full nudity with explicit sexual interaction allowed. As in B/D, the declaration of the Top/Bottom may be required, though sadomasochists may also play without any Power Exchange at all, with both partners equally in control of the play. Shibari is a Japanese word that literally means to tie or to bind. Insertion in pornography features women inserting various odd objects into their anus or vaginas. Simultaneous penetration of the mouth and either the vagina or anus. By Japanese law, the genitals of actors and actresses must be censored and up the mid-1990 so was the depiction of pubic hair. Omorashi: The act of holding one own urine until the need to urinate is urgent, making another hold in their urine, or watching another person with an urgent need to urinate. But starting with The World Biggest Gangbang , starring Annabel Chong, the pornographic industry began producing a series of films ostensibly setting gangbang records for most consecutive sex acts by one person in a short period. The wife who enjoys cuckolding her husband is frequently called a hotwife, or a cuckoldress if the man is more submissive. Babysitter pornography features usually teenage girls being exploited and having taboo sex with older, male employers. Adult animation is genre of animation geared towards adults and sometimes teens. First found in softcore movies and erotic thrillers, depictions of lesbianism entered mainstream cinema in the 1980s. It like gay boy porn associating every Christian with the zealots who cause religious wars. Heterosexual bareback sex, as opposed to sex with condoms, not only poses an increased risk of STIs, but for pregnancy as well. Performers are usually hentai sex clean-shaven, thinner naked milf and more effeminate than ones in mainstream gay pornography. In more vigorous forms of fisting, such as punching or punchfisting, a fully clenched fist may be inserted and withdrawn slowly.