Le Zèbre

Hippolyte, an eccentric notary, sees his marriage to Camille as his one great success. He also believes that love doesn't last, and this flummoxes him as they approach their 15th anniversary. To test her love for him, he promotes her seduction by an anonymous stranger, behaves badly to guests, makes love clumsily, sleeps in the guest room. All this breaks her spirit, and she asks him to move. (imdb)