Books · 1986
When at last we are sure You’ve been properly pilled, Then a few paper forms Must be properly filled So that you and your heirs May be properly billed.
— Dr. Seuss · You're Only Old Once! : A Book for Obsolete Children

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The repeated properly makes treatment, paperwork and billing sound like stages of one orderly procedure. The rhyming sequence carries the reader from medicine to money. Including the patient’s heirs extends the final demand beyond the individual, giving the neat administrative rhythm a sharper comic edge.
Context reviewed