Yayati was a powerful and handsome king of the ancient times. On being cursed with premature old-age by a sage, Yayati loses all that his youth had been giving him – pleasure, fame and riches. He approaches his dutiful son Puru to exchange his youth for his old-age, to which the boy readily agrees. Thus Yayati indulges in excessive passion for over a thousand years. Eventually Yayati realises the fruitlessness of lustful excesses and returns his youth to his son and renounces worldly pleasures and turns into an ascetic. This story from mythology is a beautiful depiction of the futility of youth if not constructively used.