Annie Girardot says in her biography that Alain Delon violently slapped her for real, as a reprisal for having left her husband Renato Salvatori, who was Delon's best friend. Through her, he beat Girardot's lovers.
A lot of well known french actors get completely naked in a memorable and unexpected fun scene. "We started with all the actors except Delon," recalled director Alain Jessua. "Then Delon arrived, and he saw all the actors, everyone naked. He had no choice but to strip naked with the others. It was a moment of madness."
The movie was shot on a French island called Belle-Île-en-Mer.
The English title, 'Doctor In The Nude', was concocted by Antony Balch in his capacity as distributor. Balch would frequently re-title foreign films he distributed with sensational, often humorous, titles.