What a difference a comma can make. Rather than going with "Surfer Dude," a title that's merely descriptive, Surfer, Dude invites many questions. Is someone speaking these words, hoping to talk candidly with the surfer? Who's speaking? Can the surfer hear? Or is he too far in the zone? What does he or she want to say to the surfer? When this person speaks to the surfer, is the the surfer wearing a shirt? OK, at least we know the answer to that question.