Josh: What do you call a person with no legs? A paraplegic?
Casey: No, that person would still have legs, just can’t use them.
Josh: Hm.

pause

Casey: Sad.
Josh looks askance.
Casey: I would be sad if I didn’t have legs! How would you run?

At this point the two of us burst into laughter, mostly at the inanity of my comments.