Game theory dating
In turn, Smith takes the lead since "one for the blonde" is Pareto efficient (a best result for the group) and a Nash equilibrium (everyone doing the best for himself). There are no Clooneys but clones (maybe Clooney clones! But this is not a Nash equilibrium, so everyone is tempted to change his strategy and go for the blonde. If everyone switches to the blonde, the final outcome is the worst possible one: no girl for anyone.
This is considered to be one of the main foundation texts of game theory.
Game theory gives the players solid recommendations on their optimal strategy and provides an external observer with a prediction of the outcome of the interaction.