Greek mythology has it that when Eos asked Zeus to make Tithonus immortal, she forgot to also ask for him to be granted eternal youth. Such were the unmeasurable desires of Eos. She wanted her prince forever, but forgot, by the spur of the moment, to want him always young and fresh. So much so that when he became old looking, and his muscles lost virility, she could not resort, but to abandon him in the confinements of a locked room where he would end up begging for death.