Hausfrauen-Report 4 (1973)

Part of the popular 1970s vintage German erotica film series Hausfrauen-Report
(Wikipedia) a.k.a. “Housewife Report.” Among the mind-boggling cast of series regulars are German beauties such as Ingrid Steeger, Dorothea Rau, Anne Libert, Angelika Baumgart, Shirley Corrigan, Astrid Boner, Elisabeth Volkmann and Doris Arden. They offer plenty of nudity in a variety of sexual situations in the unmistakably 1970s look and feel.

These films combine stories of marital infidelity with some bizarre humor and are sure to please all erotica enthusiasts.

Clarke Fountain, All Movie Guide wrote:

What do attractive German housewives do when their career-minded husbands leave the house for a long day at the office? This docudrama-styled film makes an attempt to appear serious as we peek through keyholes into the lives of these active women. Surrounding these vignettes is a breathlessly concerned narrative which details a mass of documentation from national studies and reports about adultery and divorce rates in Germany.