Found in another post here on allnurses...
I have a great story about this. The pain team was rounding in the ICU and stopped to see an early-20's-something guy who had had pleurodesis and still had his chest tube in. Now, I'll grant you CT's hurt like hell. But this guy was whining like you wouldn't believe, despite the PCA epidural. So the anesthesiologist asked him to rate his pain 0 - 10, with 10 being the worst. "Ten," the pt whined. The doc paused, and said, "No, I don't think you clearly understand the pain scale. Let me give you an example. If I took 2 bricks, and SMASHED!! your balls between them, that would be a 10. Now, given that, how would you rate your pain right now?" "Oh", the startled pt replied.
"Three."