The "courtesan" tradition
Was the courtesan arrangement only practiced in France, or other places in Europe? Watching this movie is the first I've heard of it. Young women were groomed to be mistresses, wealth men were playboys, and being a kept woman was a career goal. And both sexes were ok with it. Maybe because the men knew they couldn't marry outside of their social standing, as did the women. There seemed to be no stigma being what current opinion might be considered a "gold digger."
I'm no social historian. Watching Downton Abbey, especially the earlier seasons depicting the early 1900s, the upper class women were expected to be virgins and their goal in life was getting married. Preferably, marrying for social advancement. Period dramas depicting the US around the turn of the century showed similar moral standards.
I wonder if the working class French of the 1900s practiced more monogamy.