 Efrem Zimbalist Jr was given top billing over the four female stars, however in posters produced in some overseas countries his name was shifted down in favour of the much better known Shelley Winters and Jane Fonda.Andrew Duggan played a character based on Dr. Alfred Kinsey; Efrem Zimbalist Jr played one of his researchers, who meets and interviews the four women depicted in the film.The leading ladies consist of Shelley Winters as an adulterous middle-aged housewife having an affair with artist Ray Danton; Jane Fonda as a young widow who believes she is frigid but who is in fact reacting to her husband's violence during sex; Glynis Johns as a trendy older woman infatuated with athletic young beach boy Ty Hardin; and Claire Bloom as a “nymphomaniac”.