Belle de Jour
A blunt surprise insofar as the movies stark depictions of both a young woman's eccentric erotic fantasies alongside a rather harsh alternative lifestyle. In the middle there is a very conventional and ordinary real life tale of a married couple where the husband has no idea what's going on within his wife's mind, and life, both past and present.
Reality and fantasy seem to blend in a young woman's mind implicitly suggestive of prior experiences that influenced the lead character's real and imaginary manifestations. Not for children.