An old man wants to take up a sport, so he decides to play tennis. After a couple of weeks, his doctor asks him how he’s doing.
“It’s going well,” the man says. “When I’m on the court and I see the ball speeding towards me, my brain immediately says, ‘To the corner! Back hand! To the net! Smash! Go back!’”
“That’s great,” his doctor says.
“But then my body says,” the man continued.“Who? Me? You must be kidding!”