It's an interesting and fun optical trick, but according to new scientist (
http://www.newscientist.com/blog/sho...cing-girl.html ) the direction of rotation you perceive has nothing to do with which side of your brain is dominant.
Further, this whole left brain = verbal/logical, right brain = emotional/artistic business has long since been thrown out by actual neuroscientists. See
http://www.newscientist.com/article/...ght-brain.html .
I guess this gives me away as a left brainer, doesn't it?
Oh well, she's got nice boobs, and that's what really matters.