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By now, nobody needs the food police or even Mayor Bloomberg to tell us we shouldn't have munched that whole sack of Doritos last night or demolished that Oreo mountain, but we did it anyway.

But why? Pulitzer prize journalist Michael Moss now explains it.

He says the junk food makers have perfected the science of making their gizzard rot so enticing, it bypasses the part of your brain that makes rational decisions. It goes straight to the part that just knows what it likes.