L' anatra all'arancia (1975)

The wacky Portuguese sex comedy L’Anatra all’arancia (1975) turns a love triangle into a square when cuckolded husband Ugo Tognazzi invites his hot young secretary (Barbara Bouchet), his wife (Monica Vitti), and her new French boyfriend on a weekend getaway as part of a complicated plot to repair his marriage. When this film was first shown in Portugal the raunchy sex scenes nearly caused riots in the traditional Catholic-dominated country. Thirty years later they show it in grade schools. Check out what Monica does with Barbara’s perfectly round but slightly over-lotioned ass when tension between the two women starts to build.