Grocery stores have a lot of tricks up their sleeve to persuade you to part with your hard-earned cash. From the local farmers market look of the fruit baskets to the “wet look” of the lettuce, there’s a lot of psychology behind a supermarket’s decisions. But while making things look appetizing is the grocer’s goal, there is one product decision that has nothing to do with convincing you of freshness. It’s the bakery section bread, and it’s wrapped in brown paper bags for a reason. You might have thought that the paper was to make it look like a fancy French bakery (or even to make it go stale faster if you’re a bit cynical), but believe it or not, the brown paper bags actually help keep the bread fresher longer. The open paper bag allows room temperature air to circulate, keeping the bread crusty — in a good way —…