The ludology of G. K. Chesterton:

To take an obvious instance, it would not be worth while to bet if a bet were not binding. The dissolution of all contracts would not only ruin morality but spoil sport. Now betting and such sports are only the stunted and twisted shapes of the original instinct of man for adventure and romance, of which much has been said in these pages. And the perils, rewards, punishments, and fulfilments of an adventure must be real, or the adventure is only a shifting and heartless nightmare. If I bet I must be made to pay, or there is no poetry in betting. If I challenge I must be made to fight, or there is no poetry in challenging. If I vow to be faithful I must be cursed when I am unfaithful, or there is no fun in vowing. You could not even make a fairy tale from the experiences of a man who, when he was swallowed by a whale, might find himself at the top of the Eiffel Tower, or when he was turned into a frog might begin to behave like a flamingo. For the purpose even of the wildest romance results must be real; results must be irrevocable.