Limping inside a grocery store then leaning against the ice cream case:
ME: Okay, body. Cut it out!
BODY: I’m doing the best I can here.
ME: What’s going on? My left knee is killing me!
BODY: Well, you’re making it pretty tough on me here.
ME: What do you mean? Haven’t I gulped thousands of multi-vitamins and done about 100,000 sit-ups?
BODY: Good thing, too. Otherwise I’d be in even worse shape.