Gourmand Syndrome
Gourmand syndrome is a rare condition that sometimes occurs in people who sustain injuries to the right frontal lobe. These people develop a new, post-injury passion for gourmet food. Lesions or injuries to this specific portion of the brain cause an intense preoccupation with food and a preference for fine eating.
The condition is considered "benign" or not harmful, but it sounds pretty painful for the wallet.