Original artwork, not a still
Outside of a dog, a book is a man’s best friend. Inside of a dog, it’s too dark to read.
Behind the line
What it means
Our interpretation.
Groucho plays with the phrase 'man's best friend' by swapping a dog for a book. Then he twists it: books are great company outside a dog, but useless inside one. The humour comes from taking a cosy saying to an absurd literal place.
Context reviewed
