Why Doesn't My Son Feel Cold in Winter?

I have a 10-year-old son and he doesn’t like to wear pants or jackets. I just don’t understand it. Personally, I am always cold. Literally. I have Hashimoto’s Disease. So, when I say that I am ALWAYS FREEZING, believe it.  It kills me whenever I see Liam walking to the bus stop in a pair of shorts passing by piles of snow. Doesn’t that make your brain hurt? Logically, it makes no...