Please pet me. I want to dominate you. I have to go outside. This dog is trying to control interaction with you. If you allow the dog to determine the starting or stopping of games, you may enable certain dogs to dominate you.
Dogs express dominance to each other by putting their heads, paws, or entire bodies over each other.
So by gently placing your hand over your puppy's head and shoulders frequently, you let him know that you are the leader. If you allow him to put those paws over you, and reward him by petting him, you've reinforced the idea that he's in charge and does not have to listen to you. This does not mean you should try to dominate dogs by forcing them to the ground. To do so is to endanger yourself and the dog. If you are working with a dominant, aggressive animal, you should call a veterinary behaviorist.