Everybody's human.  Except...

I thought I made a mistake once, but I was wrong.  Of course, then I realized that thinking I had made a mistake was a mistake.  So I was right!  But if I was right, I would have made the mistake prior to even thinking, which clearly wasn't the case and, in any case, is unthinkable.  Yet if the notion of 'not thinking' in this matter is yet thinkable (as it must be, even if not do-able, otherwise what is going on?), could not the notion of being 'wrong' be right by anticipating itself?  And does this not explain why, as a species, we all have sex in our heads?  And also why, when we do have sex, we lose our heads?