Belle De Jour (1967) is a French drama directed by Luis Bunuel and starring Catherine Deneuve.
Note: quotes are from the English dubbing, not the subtitles.
Deneuve plays Séverine (a name probably chosen for its link to Leopold von Sacher-Masoch’s Venus in Furs), the beautiful young wife of a surgeon, Pierre. They seem to have the perfect life, but Séverine is sexually unresponsive, what at the time they would have deemed “frigid.” (“Frigidity” is not a term used any more, at least not clinically.) The only way she can be aroused is by imagining herself in scenarios of degradation and slavery.