Pornography is often distinguished from erotica, which consists of the portrayal of sexuality with high-art aspirations, focusing also on feelings and emotions, while pornography involves the depiction of acts in a sensational manner, with the entire focus on the physical act, so as to arouse quick intense reactions. Evolutionary psychologists suggest that rounded buttocks may have evolved to be desirable trait because they provide a visual indication of the woman youth and fertility. It is sometimes combined with BDSM features. Dwarfs or midget pornography nude milfs features performers who are dwarfs/midgets. In human sexuality, a threesome is sexual activity that involves three people at the same time. Bondage websites and bondage imagery in mainstream pornography As of 2003, specialist bondage magazines were mostly displaced by the availability of bondage material on the World Wide Web, and the presence of bondage imagery in mainstream pornographic magazines such as Nugget and Hustler Taboo magazine. Group sex most commonly takes place in a private sex party or semi-public swinger gathering, but may also take place at massage parlors or brothels or, in some jurisdictions, at purpose-built locations such as sex clubs. The smotherbox is placed on a stable surface. Bukkake is a sex act portrayed in pornographic films, in which several men ejaculate on a woman, or another man. The phrase buttered bun is sometimes used to refer to the owner of the orifice in question. In the fetish cuckolding subculture, it is most common for the female to take on the sexually dominant role and the male the submissive role, however, female subs, sometimes referred to as cuckqueans, also exist. In 1988, a sex tape caused significant damage to Rob Lowe career. The other person may do the same during or after. Such ejaculation gay fuck can be done by mammary intercourse, or masturbation over the other person, or result from the withdrawal of the penis 3d hentai from a partner mouth as he is ejaculating following fellatio, irrumatio, or intercourse.