CALVIN: How come grown-ups don’t go out to play?
CALVIN’S DAD: Grown-ups can only justify playing outside by calling it exercise, doing it when they’d rather not, and keeping records to quantify their performance.
CALVIN: That sounds like a job.
CALVIN’S DAD: … Except you don’t get paid.
CALVIN: So play is worse than work?
CALVIN’S DAD: Being a grown-up is tough.
