Bartell estimated there to be more than 8, couples regularly swinging in greater Chicago, and about 4, in the Atlanta area. Some group sex activity was, of course, more spontaneous. As with its close cousin, open marriages, couples were finding that having sex with other people was affecting their relationships despite the no-emotional- attachment rule. Every weekend, about twenty couples met at a mansion as if it were any other party, the only difference being that in about an hour the strangers would all be having sex with each other. Interestingly, expressing affection for a partner was considered bad form, the brief relationship understood as being purely about sex. Larry Flynt, the publisher of Hustler, was ordered to stand trial in Atlanta for disseminating obscene material, and had already been convicted of the same charge in Cincinnati. More than three-fourths of the female swingers he met were stay-at-home housewives, most of them with kids. As many as a couple of dozen couples converged at swinging parties, some of them involving literal group sex and others in which twosomes retreated to separate rooms. Interestingly, spouses viewed swinging as a marriage -friendly alternative to cheating, i. The general rule was to swing once, and only once, with a particular couple so that the activity would not cause marital discord or breakups. Threesomes consisting of two women and a man were a popular choice, and husbands often took special delight in watching their wives have sex with other men. Two couples would arrange an informal meeting and, if all went well, plan a much more intimate second encounter. SHARE Swinging or mate swapping or group sex had probably always been around to some extent in America but the wild west of sexuality in the s was the ideal climate for it to thrive. In his Group Sex: Finding such people was easy.