The trend of dying pubic hair.

[Hephaestos]

well why do animals have fur? to keep warm.

Nowhere does it say that they can't be heated in more than one way (closer to body), the hair is more to isolate from the cold, the heating only comes from the body indeed.

and nowhere does it say that they can't have more than one function (which would warrant their presence for women).

there doesn't need to be a contradiction snake.