David, seemed to be a very Intelligent Person ( ever play Word Games with Him? ) and He seemed to be in Control.We all come to this Site, because it meets a Need, in Our Lives, relevant, to what is going on with us. Perhaps, this Site, had done all it could do for Him and He just moved on. If He came to this Site often and felt Comfortable, here, then this Site fullfilled His Need at that Point in His Life.