I have been running barefoot, almost exclusively, for about three years now. And I have developed quite a serious problem. No, I haven't damaged my feet. Or lost any toes. In fact, I'm enjoying running more than ever before. The fact is, though, that I find I'm no longer capable of running in any type of footwear. Ok, I can still run if I'm wearing shoes - I don't physically become incapable of putting one foot in front of the other - but I find shoes cumbersome. And by