Sometimes you just need to laugh, not smile slightly, not feel vaguely amused, but really laugh with that can’t catch your breath, might wake the whole house up laughter.  The kind of laughter that makes everyone ask you what is so funny, the kind that makes your whole day brighter.  What do you read when you need a funny book? One book that is guaranteed to make me laugh until I have tears streaming down my cheeks is Our Hearts Were Young And Gay by Cornelia Otis Skinner and Emily Kimbrough.  It is the account of their European tour in the 1920s. “We had been planning the trip for over…