A Man and a Woman (1993)
A man evades a debt collector, so the debt collector sleeps in his house to wait for him and ends up screwing the man’s girlfriend.
Swinging
Sex Games for Couples (1976) aka Fantaisies pour Couples – France
Two couples are cheating with each other’s spouses before having an official wife swap.
Official Wife Swap Parody (2010)
Couples exchange wives to live the other pair’s life, but unlike the tv show, swapping goes up to the bedroom.