Me: Why are you bothering me?
Knees: We could give you a lot more trouble than this!
Me: This is quite enough trouble—stiff in the morning, swollen, painful after driving, slow moving …
Knees: Why are you mad at us? You are the cause of this pain.
Me: I should have taken out a warranty on you—for 100 years!
Knees: We can’t last forever. The way you abuse us on that tennis court, it’s a disgrace!
Me: Well, I must have gotten a cheap model. I need titanium.
Knees: Well, we must have chosen the wrong legs to be on.
Me: Is there anything else you want to tell me?
Knees: Let’s put our feet up and have a glass of wine!