"Part of human nature is to be introspective, to probe. Part of our "verbal behaviour" deliberately, often palyfully explores the boundaries between conceptual levels of systems. All of this has its root in the struggle to survive, in the fact that our brains have become so flexible that much of their time is spent in dealing with their own activities, consciously or unconsciously. It is simply a consequence of representational power - as Kurt Godel showed - that systems of increasing complexity become increasingly self-referential" - Douglas R Hofstadter, in "Metamagical Themas"
Maybe, I am providing more evidence to this fact, by writing more and more that concerns myself!