Gratuitous Reference to Shadows On a Cave Wall:
Not a big fan of most of what I've seen by Bertolucci, but The Conformist is probably one of the most beautiful and sad films have seen. Trintignant's also one of the very few actors I've ever actually had a crush on.
which comes with a call to reread the the bit about the philosophers' drinking party. (My favorite. Of course, it's a popular subject among girls. Not so much the drinking part and the trash talk beforehand, though it is kind of entertaining here.)