Most religions disapprove of sex outside marriage (see religion and sexuality), and the consequences range from very serious to none.Also, marriage is defined in quite different ways in different cultures, for example, with "short-term marriage" (see Nikah mut'ah) a cover for prostitution, or polygamy.Some couples see swinging as a healthy outlet and a means to strengthen their relationship.Others regard such activities as merely social and recreational interaction with others.This stands in contrast to swinger couples who are already in committed relationships and are only seeking compatible friends with whom they can engage in recreational sex.
Swingers who engage in casual sex maintain that sex among swingers is often more frank and deliberative and therefore more honest than infidelity.
Anonymous sex is a form of one-night stand or casual sex between people who have very little or no history with each other, often engaging in sexual activity on the same day of their meeting and usually never seeing each other again afterwards.
describe a situation in which a person has sex with someone they generally consider a friend or someone they are fairly close to.
They are not in an exclusive romantic relationship, and probably never will be.
However, a 2011 study published in The Journal of Sex Research found that two out of five single women and one out of five single men in "friends with benefits" relationships hoped that their relationship would eventually turn into a full-fledged romance.