Sexual relations between women have been illustrated as well as narrated, but much of the written material from the early modern period has been destroyed. Participants who exert sexual control over their partners are known as dominants or tops while participants who take the passive, receiving, or obedient role are known as submissives or bottoms. For legal reasons, the vast majority of so-called reality porn involves professional actors and actresses posing as so-called amateurs. Bisexual pornography gaysex is a genre of pornography which most typically depicts one woman and two men who all perform sex acts on each other. Men may find stimulation of the anus, rectum, and adjacent organs enjoyable. Comic books often featured characters being tied up and tying others up, particularly in damsel in distress plots. The arousal from being desperate comes from the sensation of having a full bladder. Some straight actors have started acting in gay porn only to be accused of being gay while others first step was to strictly do solo scenes. Diaper pornography involves mature milfs performers wearing diapers, sometimes with an adult performer acting in the role of a caretaker. Gloryhole pornography features women performing fellatio on unidentified men through a small hole made in a bathroom divider. Sometimes one or more fingers may be inserted hentai videos into the vagina to stroke its frontal wall where the G-spot may be located. Rainbow parties were covered on The Oprah Winfrey Show in 2003, and became the subject of a juvenile novel called Rainbow Party. Common positions include lying on back or face down, sitting, squatting, kneeling or standing. The phrase is commonly found on porn sites. Rape pornography features performers simulating rape. When the interest in a particular subject is obsessive, the behavior may be described as stalking. It is suggested that much of the obscurity and the uncertainties about female ejaculation are related to mixing up these two phenomena. It is sometimes combined with BDSM features.