With the right guy, age play is great. It can be unbelievably hot to treat a grown man like a young boy. I said many times that I think early bed times, groundings and loss of privileges are effective domestic discipline tools. I used all of these punishments. And it has always been fun for me and very hard for the man.
In a way it is easier to accept a spanking than accepting being sent to bed at an early time or being grounded for some time. I think this is due to the fact that the man can be pretty passive while getting a spanking. It hurts, it is a bit embarassing but at the same time the person being spanked is getting a lot from the spanker. Time, dedication, attention, touching, scolding, ...the spanker gives a lot. And the submissive partner gets it all. The submissive partner is in the center of the spankers attention. It is pretty much impossible to spank somebody and not give him my full intention.
Adding to this the fact that as a good loving and caring dominant woman I think it is my duty to make sure that I do not actually "hurt" him in a bad way, I need to pay attention to his words and body language all the time. I might be angry with him and punish him for his acts, but I will always make sure that he is safe and knows that he is loved.
All he has to do is: submitting to my dominance. Once he is over my knees, he is receiving what I am giving him.
In regards to early bed times, groundings and loss of privileges however, the man is not receiving much. Instead, important things are taken away from him. He does not get my attention. He does not feel me. I dont care much if he is ok, because I already KNOW that he won`t be harmed. It might hurt his male ego a bit, but this is exactly what I am intending, so, I am not worried about it :-) In these scenarios he is not the center of my attention. Far from it. I might have fun or be on the phone with a friend, while he is sent to bed alone with nothing to do but trying to fall asleep or waiting for me to follow him to bed. This makes submitting really hard. And I cannot tell you often enough how much it means to me when a man submits to me in such a way.