Groan at the dad jokes all you want. One day you’ll catch yourself telling them, and you’ll miss the original.

Habits that irritate you now tend to become the ones you miss, which is an unfair trick of memory. The groan is genuine and so is the affection underneath it, and in twenty years the joke will arrive in your own mouth uninvited and you will hear whose voice it originally was. Nothing has to be lost yet for this to be worth knowing.

Laugh at one on purpose this week rather than performing the groan. Ask for the worst one he has got, and remember the delivery as well as the line.