They only seem to be talking to themselves. What if they're not? What if they're actually synchronized? What if for every guy walking by himself going, 'Nobody tells a navy man when he's had enough to drink 'cause only a navy man knows when he's had enough to drink,' maybe there's another guy, 30 miles away, walking by himself going, 'Shut up! You weren't in the navy. Kiss my butt. I don't need this.'