The Fourth Sex (1963)

Michel and Paul earn money from passers-by by doing chalk drawings outside the Louvre. They also make the scene at the hot spots of Paris. Sand is a wealthy and luscious blonde lesbian artist who paints nude girls and houses an entourage of chic chicks at her loft. When Michel's gorgeous sister shows up from out of town, both Paul and Sand fall for her. During a wild Roman costume party, she is abandoned by the disgusted Paul, and poses nude for Sand. An outraged Michel bursts in on them and confronts Sand, but some unexpected emotions between them begin to stir. Will Sand forsake her decadent lifestyle for the arrogant Michel?