What do people spend all their time thinking about?  I suspect most people spend most of their time thinking about people.  I suspect they think about their relationships with other people.  This is just a wild stab in the dark but if I personally think this takes up the largest time slot in most lives.  Actually now that I ponder this a little more, it is probably just people with easy lives that think about relationships all the time.  If I had more serious things in my life I would probably think about those things more often.  I also wonder if the great philosophers and great scientist or any of the "great" thinkers for that matter were/are great because they didn't spend all their time thinking about relationships.  Was Einstein fixated whether or not she really loved him.  Was Socrates concerned about the little scolding he had just received and if that meant they weren't friends anymore.  Perhaps these people just spent more time not thinking about these trivial things that occupy our minds and, in the long run, never really make a difference that we think about them.  Or perhaps I just don't have enough persepctive on the world to realize that most people really don't bother with these trivial things, although I do suspect these obsessions and fixations can be found in most people minds.