Are you cold today?

4°C clear start.
Do you feel the cold more if your family is from Africa, or southern Asia? Many pupils at school think so. They all had anecdotes about their families at home who run the heating at home on high. Some wear warm, woolly clothes right into high summer. They suggest it’s genetic!
I suppose it’s a form of ‘soft racism’ but they would be horrified to consider its association with that word. I offered the idea that we can acclimatise to a country’s climate, but they thought race was the real reason.
There is much distortion in the meaning of the word ‘racist’. I would be surprised to hear that feeling cold has a genetic cause. However, I am prepared to change that belief.
Evidence anyone?