If you're old, you need a sense of humor.
The legendary Eulenspiegel is long dead. But his spirit lives on, and not just in the satirical magazine of the same name. Its former editor-in-chief has taken a look at his own life as a pensioner and at the quirks and foibles of senior citizens through the eyes of the scoundrel.
Being old is not necessarily funny, but it does have its comic sides - plenty of material for the author, a concentrated load of wit for the readers.
"Hey, old man!" is a gift for people who already have everything: the necessary maturity, a few hiccups here and there, the first failures, gaps in their memory and teeth.