Of Course I Washed My Hair Last Year (I’m Almost Certain) - New York Times

This article brings something up I have been thinking about for a long time (we can't all be mathematicians, you know.) To shampoo or not to shampoo? 

One of the few true things I learned working in the beauty biz, was that it really isn't good to wash your hair everyday. Well if you're me. I won't speak for anyone else.  I wash my hair three or four days a week, but condition everyday. My hair actually does look nicer when it's a little dirty. But I think I would go mad if I didn't wash it for six weeks! Much less a decade. It gets all greasy, and I can feel, like the sides of my face breaking out. Gross. Thoughts?