The Somerton Man had a great physique with well developed high calf muscles, very soft hands, and no callouses on his hands or feet. You can develop calf muscles with calf raises (repeatedly going up and down on your toes). A profession such as ballet dancing would would explain condition, As would wearing boots with a high heel. It can also be genetic. Jestyn's son was a professional ballet dancer who had natural talent. The story was that when he was a kid he didn't ask to go to ballet lessons. One day, out of the blue Jestyn grabbed his hand and dragged him off to lessons. He did well enough to become a professional.