An interesting picture

Look at this picture, is this gril rotating in a clockwise direction or anticlockwise direction?

If the first time you looked at it and the girl was rotating in an anti-clockwise direction, then you use the left side of your brain more than the right side. If the first time you looked at it and the girl was rotating in a clockwise direction, then you use your right side more than your left side.

Statistically, most of people looked at it as an anticlockwise rotation at the first sight. The interesting thing is that more women than men among those seeing a clockwise rotation.

Look at this picture, can you control the direction of the girl's rotation with your brain?

Can somebody tell me why someone look at it as a clockwise rotation while others look at it as an anticlockwise roation?