Milo is Italian for Prometheus, the Greek god who gave fire to man, and was thus forced to be chained to a rock for eternity while buzzards ate his liver as his punishment. Since Milo is a god, he heals everyday, however, he is not without pain. And everyday, the vultures come again to eat his liver.
Well, Milo, being forced to endure such pain day in and day out, began to adapt. As the days passed, Milo felt less and less pain. Sure, it hurt like hell, but it was nothing like when he originally began the endeavor. Since the the vultures did the same thing everyday, Milo was becoming conditioned. If the vultures were to eat, say, his kidneys or his intestines, it would hurt a whole lot. But they were only interested in his liver. How fortunate for him that because he did not recieve any new stimulus, he did not suffer anything new. He would stay at relatively the same pain threshold, or the same place, if you will, for eternity.
The vultures, however, were well fed on a god's high protein, high iron content liver. Because the liver had magical properties, they were able to maintain a bulk while putting on little, if any, fat. They hit the gym every night after feasting on Milo's liver to hit new PR's almost weekly. By loading themselves with more and more weight, progressively, they were able to become stronger and stronger.
Eventually the vultures became too yolked to fly around and Milo was stuck, chained to a rock, for eternity, soaking up rays. Eternity didn't seem too long to Milo, who soon only wanted to cool drink and maybe a magazine to read. Anything but Flex, thought Milo.