Original artwork, not a still
Horse sense is the thing a horse has which keeps it from betting on people.
Behind the line
What it means
Our interpretation.
The joke defines good sense by what a horse refuses to do: wager on human beings. It implies people are unreliable bets, and that a wiser animal would never risk anything on them. The humour is dry cynicism about human trustworthiness, delivered as a tidy definition.
Context reviewed
