Thin people are afraid of heat, but they are also afraid of cold, because there is not much fat, so your subcutaneous tissue is blood vessels and muscles. High temperature will accelerate your blood circulation, and there will be a reaction that feels very hot. Fat people are not afraid of heat, but there is too much fat in their bodies and their basal metabolism is slow, so it is difficult to consume excess calories, which leads to body fever, but fat people are not too afraid of cold in winter.