If the King sleeps on a king mattress, and the Queen sleeps on a queen mattress, where does the Prince sleep?

On an heir mattress.

More dad jokes you'll groan at

What do you call phoney spaghetti? An im-pasta.What did the boy say to his fingers? I'm counting on you.How do astronomers organize a party? They planet.How does the moon cut his hair? Eclipse it.Ireland's capital is the fastest growing city. Every year it's Dublin.Why did the candle quit his job? He felt burned out