It's 3 p.m., you're starving, and if your boss talks to you again, he might find himself on the business end of your stapler.
As time continues toward the end of the work day, your mood and your energy levels continue to plummet. At 5:30, you're commuting home, and all you can think about is how great a Twinkie would taste while you deal with the people who have seemed to forget what a gas pedal does.
By 6, you're finally home. Feeding time! At this point you're ravenous. Anything is fair game. Your body is telling you to grab the quickest source of energy you can find: sugar!
We know what happens next, halfway through a pack of Oreos; you come to your senses and realize that you just got off the exit on the healthy eating highway.