Well sure you can walk talk and indeed do many of the things I can do, but how are your joints, or your memory? I know that I am not getting any more memory myself, and thank *** my joints aren't having any problems, Not only that but just because someone is old doesn't mean they aren't healthy, I said around 50 is old, 30-50 is middle aged, a middle aged man on the work place (especially mine) are experienced and knowledgeable, and the new guys like my self aren't stupid, but don't know all the tricks. With age comes experience, but also limits, and the rate at which each person gains these two things are unique and completely independent of each other.