We all know that America's greatest poop phone user, Anderson Cooper, will take every opportunity to take his shirt off on camera. But what about his arms? When he rolled up his shirt to get a flu shot on today's episode of Anderson, he paused briefly to flex for the crowd and said, "Welcome to the gun show." Then he got all bashful about it and his infamous giggle followed. Oh, Anderson, you're so cute when you don't know how hot you are.