Though my life I have encountered a lot of "brainy" people, most of them don't have an ounce of common sense. You can certainly say that "they are sooooo intelligent, they don't have any brains left".
It's been my observation that after so much education, the brain can't hold anymore. In order for the brain to hold more info, something else has to leave, and usually it's common sense. It's just my theory, but I have seen it time and time again.
Personally, I found this guys shower video quite disgusting. I had my mouse on the "stop" button in case he did undress!