I'm guessing that the cavemen failed to realise that their constant stupid scratching was keeping their wound from healing perished; while those who exercised a modicum of self-discipline and self-denial (arts that seem to have been lost to modern youth as Western civilisation declines ever faster) survived and reproduced. Based upon this hypothesis, I predict that modern humans have an alert system that causes them to pay attention to any wound they have just scratched and cease scratching it if it becomes clear that the constant scratching is not helping the wound heal one little bit.



But all this is merely lay logic; something anyone could do, who has paid a modicum of attention to learning how natural selection works. I reckon dr Chris is smart enough to know this, which is why as a challenge to the intellectually lazy he has refused to address this no-brainer and instead chosen to give us the much more interesting benefit of his specialist knowledge as a Doctor; something we our GPs never have time to explain to us.



Thank you Doctor Chris; the neurobiology, microbiology, mechanics and chemistry of wound healing are fascinating and draw to our attention the miracle that is the human body, hopefully reinforcing the tragedies that are the modern cultures of violence and making some of us resolve to eschew violence and cultivate our compassion.