It's been a tough winter. Temperatures have plummeted and parts of the country have been crippled with ice and snow. But that's not enough to take a bite out of America's love of chocolate snacking, according to recent research from Hershey Foods Corporation (NYSE: HSY). In fact, when the mercury falls, many people reach for their favorite sweet treat. A recent national survey showed that among chocolate lovers, nearly half are more likely to snack on chocolate in cold-weather months than in warm-weather months.