 That's a great question because I think that it is different in art than it is in life, particularly in this arena of friendship. The answers sort of differ for different genres. The engine of a great comic friendship is often that lack of parody I just touted in true friendship, the lack of symmetry. But real comic gold can also be mined if there is a disparity but the friends involved in the relationship actually feel that they've both got hand in the relationship. I think that's the odd couple formula.