"Belle de Jour" is an exploration, perhaps an expose ,of the clandestine desires, elaborate deceptions and capricious natures of modern women. Catherine Deneuve is Severine, a model bourgeois wife on the surface , but underneath is the repository of dark, sado-masochistic sexual fantasies,that lead her into prostitution. Deneuve plays "Belle de Jour" superbly well, making Severine's unlikely descent into degradation and depravity entirely credible. Her double life leads to jealousy and ultimately tragedy ,however ,as her two lives converge in the form of one of her clients, Marcel. "Belle de Jour" is an entertaining, well acted film with good all round characterisation.