From let to right, in case you're not up on your American pop-culture, "Hoss" (Dan Blocker), "Captain James T. Kirk" (Denny Crane himself. . . the GREAT William Shatner) and "Gomer Pyle" (Jim Neighbors).
I was reminded of this point while in the waiting room at the ophthalmologist a few days ago watching people come in and sit down after they checked in at the reception desk. For the love of God, keep your mouth closed when you aren't talking. Sitting there staring into space (or, more likely, your I-phone) with your mouth hanging open ain't a good look on anyone. It does not exactly make you look intelligent. You need to be a bit more aware of what your body is doing and how you look to everyone around you. Close your mouth.
-- Heinz-Ulrich von B.