Le Déjeuner sur l'herbe (Picnic on the Grass aka Lunch on the Grass) (1959)

Etienne Alexis, a candidate for president of the new Europe, is a scientist promoting artificial insemination for social betterment and therapy to eliminate passion. To celebrate his engagement to a cousin, he hosts an aseptic picnic, where mother nature asserts herself. A shepherd's flute conjures a windstorm that throws Alexis together with the luscious Nénette, a farm lass who wants to have a baby but is unimpressed with men.