I had two hours of class today. In the second hour, among many other things, I went three rounds boxing with my sensei. It's like trying to block lightning. He has full control of his punches, but you feel them.
My wife said I looked miserable when I got home. I told her I was very, very tired.
"There is nothing more tiring," I told my wife, "than getting hit."
Eyebrow raised, she said, "I have no idea why you enjoy this."
I said, "I'm not sure I would if every time were like this."
I did learn a lot, however. In grappling, I was reminded of the D'Arce choke, which I'd forgotten how to do even though I'd mentioned it before; I also learned a way of flipping an opponent who has me in side control by grapevining his leg.
And in the black belt class, we worked on two ways of setting up the uppercut; 1) Draw the opponent's right hand to the side of his head by throwing two open hand hooks, then go into position to throw a very hard hook--but throw a front-hand uppercut to the head, followed by a cross; or 2) slip the jab, take a stop towards the opponent, then throw the backhand uppercut followed by the front hook (then move away).
Finally, sensei told me I was dropping my hand BEFORE throwing my jab, which was allowing him to come over the top with his cross. And I need to keep my hands up even when a speedster like him is out of reach, because he can move in and hit my head so quickly.