Thinking makes you fat. It turns out that performing mental tasks, like trying to solve problems while working at a computer, stimulates the appetite SOOOOOOOOOOOOOO much that people tend to eat significantly more calories than they burned while performing the "knowledge-based" tasks. Apparently, mental work "destabilizes" the levels of insulin and glucose, two critical components in the body's regulatory and energy machinery, thus stimulating the appetite.
So, now I just need a job where no thinking is required... it makes so much sense now!!! And ABC News is telling me -- so it must be true!