There are number of types of sex parties: Swinger party/gathering A swinger party or partner-swapping party is a gathering at which individuals or gay cock couples in a committed relationship can engage in sexual activities with others as a recreational or social activity. A related term used in the genre is the term cougar, which implies an older woman as predator. Such ejaculation can be done by mammary intercourse, or masturbation over the other person, or result from the withdrawal of the penis from a partner mouth as he is ejaculating following fellatio, irrumatio, or intercourse. Diaper fetishism, nappy fetishism or diaperism, is a sexual fetish in which a person feels a desire to wear or use diapers. Examples of heterosexual pornographic film series featuring creampies include Cream Filled Teens and Internal Cumbustion. Additionally, the buttocks give an indication of the shape and size of the pelvis, which impacts reproductive capability. This can, however, redirect semen milf xxx into the bladder . Those with diaper-related paraphilias differ widely in their focus of attention. Men may also rub or massage the glans, the rim of the glans, and the frenular delta. Patricia Hill Collins, an African-American writer, theorizes that this is derived from a stereotype that those of black descent are promiscuous, and their buttocks are objectified by porn as a result. It is also followed by dedicated industry publications and trade groups as well as the mainstream press, private organizations , government agencies, and political organizations. Sigmund Freud considered foot binding as a form of fetishism. It is geared towards heterosexual men, who most typically define a threesome as such. In the fetish cuckolding subculture, it is most common for 3d hentai 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. Sadomasochism is practiced in isolation relatively rarely, though some masochists report biting, pinching, or even stun-gunning themselves as a prelude to, or as part of, masturbation.