The Ostrich Has Two Eggs

The Ostrich Has Two Eggs (French: Les oeufs de l'autruche) is a 1957 French comedy film directed by Denys de La Patellière and starring Pierre Fresnay, Simone Renant and Georges Poujouly. It was based on a play by André Roussin.
The film's sets were designed by the art director Paul-Louis Boutié.
Synopsis.
A father sticks his head in a sand like an ostrich, while his two growing children become increasingly sexually experienced.