Science is the ultimate pornography, analytic activity whose main aim is to isolate objects or events from their contexts in time and space. This obsession with the specific activity of quantified functions is what science shares with pornography.
Presumably all obsessions are extreme metaphors waiting to be born. That whole private mythology, in which I believe totally, is a collaboration between one's conscious mind and those obsessions that, one by one, present themselves as stepping-stones.
I would say that I quite consciously rely on my obsessions in all my work, that I deliberately set up an obsessional frame of mind. In a paradoxical way, this leaves one free of the subject of the obsession.