The guy must love life. My very own Great Uncle, lived to be 104, and got around just fine, drove his own car, shoveled his own driveway, cut and split his own wood. When any of us would go and try to help, he would say that was his job, and get out of the way. I asked him why he wouldn't let us help. He answered that he loved life, and chores were part of life. So maybe it is the same for this guy.