1) A photographer be interested in capturing the human element in his/her images because human beings can be as inspiring as everything that surrounds a photographer. Every artist has its own source of inspiration, and what if artist is the inspiration itself? Exploring human's beauty is the main part of developing your art (in this case photography) skills.
2) I find hands, to be more exact,wrists, to be the most inspiring part of human body. There is a philosophical aspect in my opinion becuase people use their hands to create. Every person is unique, its hands are unique and these hands can create unique things.