Tiger and the Pussycat (1967)

The Tiger and the Pussycat (1967), originally Il tigre in Italian, is a comedy drama about a middle-aged businessman who is married, but is innocently introduced to a schoolgirl, complete with pigtails. When years later the schoolgirl grows up into a promiscuous woman, played by Ann-Margaret, she pursues the older businessman, but she pulls all the strings, and he likes it that way. The nudity is pretty good, too, especially for the time. Ann-Margaret is seen from afar washing off body paint in a shower. When the camera comes in for its closeup, we see her from behind and get a bit of side boob. Between that and the 1960s fashions, this is a must see.