There are two circles of advantages and disadvantages on a person's head.

The circle above a person's head is called the head spin. Generally, one grows on the top of the head, some two or three, and some grow in other parts. There is a saying in my hometown: in the melody death metal, one head turns well, two heads turn badly, and three heads turn fast. In fact, there is no scientific basis at all. It's not morbid and there's nothing wrong with it. It is only related to individual differences. Don't worry, there are no obvious advantages and disadvantages, that is to say, there is no obvious difference, so there is no need to care too much.