A friend's definition of "favorite movie": You're having sex with the motel TV on (not part of my experience but I'll roll with it) and all of a sudden you realize the favorite movie is on. You tell your partner it's time to stop what you're doing and watch. Oy.
But if he has never seen Truly, Madly, Deeply...that would be the one. I'm gonna post a shorter clip because I want you to rent the whole thing if you haven't seen it. One thing I love about this clip is, it's two very intelligent creative people, obviously turned on by each other's brains, having fun together. (Nevermind one of them is dead and has come back as a ghost. Like that's a roadblock to a relationship. Please.)