The most common depiction of a hermaphrodite is a person with a female face, breasts, and build, hentai movies and a penis , although there are other combinations. Masturbation has been depicted in art since prehistoric times and is mentioned and discussed in very early writings. In pornography, depictions of lesbian momporn sex form a popular subgenre, directed toward a male heterosexual and female homosexual audience. When sexual activity is centered on one of the threesome, then the activity may be described as a gang bang of the person. Interest in BDSM can range from one-time experimentation to a lifestyle. It can be combined with fellatio and the woman may move her breasts up and down on the penis for an additional stimulation, usually before the man reaches orgasm. Fisting may be performed with or without a partner. Freud, however, considered such extensions of sexual interest to fall within the range of the normal, unless marked gay movies out by exclusivity . With second wave feminism and growth of scholarship in women history and sexuality in the 20th century, the definition of lesbian broadened, sparking a debate about sexual desire as the major component to define what a lesbian is. As observation is encouraged, voyeurism and exhibitionism are closely associated with dogging. Spanking or whipping pornography involves spanking or whipping, generally of the buttocks, with the hand or with other objects such as belts, switches, paddles, brushes, or whips. After the prerequisite level of sexual stimulation has been achieved, and ejaculation becomes imminent, the male will position his penis so that the semen discharged will be deposited onto his partner face. This technique may include the use of a simulacrum, or artificial vagina. In some areas, there are laws stating it is not legally possible to consent to be killed, and elsewhere it may still be legally dubious . Fat fetishism also incorporates stuffing and padding, whereas the focus of arousal is on the sensations and properties of a real or simulated gain.