Trully good post... though I think that aesthetics is something we bring with our dna (or even mRNA) and it is somehow connected with survival rates. For example most people find cute babies and puppies. They have more "round" features and curves are appealing. This increases the chances for them to be liked and loved and therefore increases the chances of survival. Defects on the other hand sometimes are not aesthetically welcomed, most likely because our genes are programmed to like the healthiest form of our species.