My favourite scene in this episode would have to be, I think it's near the start of the episode, when Maddie knocks on Davids office door and you hear a return knock and she opens the door and she doesnt see David copying every move she make right behids her, it's an absolute classic that has me in stitches everytime I sit down to watch it.
I really like the scene when D&M are in the private booth at the adult book store. When Maddie wants David to explain how things work in the booth, he tries to deny ever having been in one before. THEN she coughes and gives him the "Don't mess with me, will you get serious"-look. Ever since the first time I saw this I thought she was pointing at the wall behind him, as if someone, or David himself, had scratched something about him on the wall! I just can't get this notion out of my head. ;D