Playing games with the boss, should I put water in it?

Playing games with your boss is definitely a must, because you play games with your boss just to make him happy. If you are really better than the boss, you should properly release water. If you don't love your boss, you don't need to let go. In short, you'd better keep up with his games, feel better and give him some suitable books. Then he will have a good time. You two can still get along. Do things tactfully, and you can advance and retreat.