Calvin and Hobbes by Bill Watterson for May 12, 2015 — GoComics

Calvin: How come grown-ups don’t go out to play?

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.

Dad: … Except you don’t get paid.

Calvin: So play is worse than work?

Dad: Being a grown-up is tough.