You've done everything—endured diets, purged your freezer of Ben & Jerry's, and educated yourself on fat, sugar, and calories. Yet, you can't manage to lose weight.
What's wrong with you? According to standard economic theory, which gives humans (perhaps too much) credit for making rational choices, those efforts should be enough to change your behavior. If you know the consequences but still get fat, you must want to be overweight.
“Losing $100 is more painful than gaining $100 is pleasurable”
Via The Learning Factor