'Pinocchio’s Mouth' - Season 6, Episode 8
Charlie's new girlfriend asks him to spend the night at her place, while Alan tries to enforce a punishment on Jake.
Air Date: November 16th 2008.
Alan: Oh, you poor guy, you have to drive 45 minutes to get laid.
Charlie: And 45 minutes to get back!
Charlie: She's got one of those wooden toilet seats. It'd be like going to the bathroom on Pinocchio's mouth.