The weather is cold! Why do girls wear pantyhose? I think their legs are so thin. Are they really not cold?

There are several situations: first, girls want to look beautiful, but they are not afraid of the cold; Second, what pantyhose to wear, the outer layer is black silk, and the inside is flesh-colored velvet, which looks very thin but actually very warm; Three, South Korea, Japan and other brands of self-heating pantyhose (I don't know if it is really warm). Anyway, I just want boys to think she's beautiful ~