We all know the opposite sex can be a baffling, even infuriating, species. Why do most men use the phone to exchange information rather than have a chat? Why do women love talking about relationships and feelings with their girlfriends while men seem drawn to computer games, new gadgets, or the latest sports scores? Does it really all just come down to our upbringing? In The Essential Difference, leading psychologist Simon Baron-Cohen confirms what most of us had suspected all along: that male a