Interesting! And yet when I research this doctors say there is no difference between those who are negative and the lucky positives.

I once taught a little girl who would cry on wintry mornings. Her mother, a doctor, had no idea why.

I asked if she'd allow me to give her one of those heated cuddly toys in the morning. Immediately we had the solution to her problem. From then on her mother also ensured her daughter was dressed warmly.