You may ask yourself, do I have to spank my guy or tie him up to have sex with him? The answer is a resounding, “NO!” You don't have to do anything. However, if you don't do anything, how will he know you are in charge?
Simply put, being in charge means that you make the decisions. You know what you want, and you are not afraid to say it. Whether we are talking about buying a new car or choosing a movie to watch, you know what you like. Maybe it isn't his favorite color, or he hates this actor or that subject, but who cares? The decision is yours to make. If you want to ask for his opinion, there is nothing wrong with that, as long you realize that you are not obligated to do so, nor are you obligated to go with his desires.
Do you have to engage in tease and denial? Do you have to include corporal punishment? Do you have to ask him when he wants to have sex? Or if he wants to be on top? The answer to all these questions is, again, “NO!”