What does the vortex on your head mean?

One is good, two are bad, and three are top of the old turtle covers.

One convolution is good, the second convolution is bad, and the third convolution and the fourth convolution die quickly.

One spin, two spins and three spins are not fatal.

Turn a dog, turn a cow (stubborn) and turn a horse's head (monkey) three times.

……

According to this statement, the two spins on the top of the head are stubborn and insidious above the forehead. Three spins are violent, but they are not!

The biological explanation is that the formation of hairrotation lies in the fact that the fetus is in the mother's body, and the natural and uncertain result of fetal hair in the uterine cavity during development is caused by the peristalsis and rotation of the body. Hair and skin have a certain angle, you can look at hand hair, not vertical, about 30 ~ 35. In a limited space, the tilt constantly changes a little direction, and the angle remains the same, overlapping to form a spiral.

From this perspective, it is difficult to determine an adult's personality, and there is no scientific basis.