What's the point of that curly hair on your head?

There is a folk saying that children with too many brains are either smart or stubborn.

In fact, the spin on the head is like this from a physiological point of view:

The hair shaft inclines to the skin. Many hairs are inclined in the same direction, which is called hairflow or hairflow. The flow of hair on the top of the head can form a spiral arrangement of the center outward and the surrounding hair, commonly known as hair spinning.

I hope to adopt ~ (_)