Headache is perhaps the most dangerous weapon of nature against man. No matter how many nuclear weapons you have made, you still have a headache saving them from hackers. No matter how much wealth you have made selling beer in Aidin, you still have a headache of running around in a court of London. In a way, it is a great leveller. It’s almost like nature knew that she would be screwed up by us human, so she put one of her own in our head – an ache.