"Chicago area couple, early 30s, wish couples and single women interested in uninhibited experimentation. Also interested in good food, art films, music, complete evenings of enjoyment. Send address and photo."
That advertisement is typical of several placed in the magazine Kindred Spirits by Northern Illinois University Anthropology Professor Gilbert D. Bartell and his wife Ann. The Bartells were looking for people to take part in a study of group sex. The results of that three-year study were published in a refreshingly unclinical book called Group Sex: A Scientist's Eyewitness Report on the American...
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