Sexual scenarios may involve male domination, female submission, exhibitionism and erotic entertainment. Strictly speaking, bondage means binding the partner by tying their appendages together; for example, by the use of handcuffs or by lashing their arms to an object. Freud, however, considered such extensions of sexual interest to fall within the range of the normal, unless marked out by exclusivity . Shemale is a term primarily used in sex work to describe a trans woman with male genitalia combined with female secondary sex characteristics, usually including augmented female breasts, from breast augmentation and/or use of hormones. Fantasies of group sex are extremely common among both men and women, and group sex is a subgenre gay fuck in pornographic horny milfs films. While bondage is a very popular variation within the larger field of BDSM, it is nevertheless sometimes differentiated from the rest of this field. Fisting may be performed with gay hentai or without a partner. Others may also use vibrators and other sexual devices more commonly associated with female masturbation. A pearl necklace is a slang term referring to a sexual act in which a man ejaculates semen on or near the neck, chest, or breast of another person. Pleasure for the giver during anilingus is usually based more on the principle of the act. Since at least 1973, it has also been used to refer to a sexually attractive young woman. Caro rejected that as being a necessary conclusion, stating that female fatty deposits on the hips improve individual fitness of the female, regardless of sexual selection. First found in softcore movies and erotic thrillers, depictions of lesbianism entered mainstream cinema in the 1980s. Twink pornography features younger performers, and usually features young men under 30 who identify as gay or bisexual. Ethnic pornography is a genre of pornography that features performers of specific ethnic groups, or depictions of interracial sexual activity. Facial cum shots are currently regularly portrayed in pornographic films and videos, often as a way to close a scene.