But why do we enjoy things more when we’ve had to suffer for them? It’s a question that’s puzzled neuroscientists for decades, but research published yesterday in Nature is shedding light on this phenomenon. This kind of “sunk-cost fallacy” isn’t just a common trap in the business world, it also pervades the animal world. Organisms from ants to human beings tend to value those things they had to work for more than those that came easily. The dopamine release we saw may enable you to pay those steep costs in the future.”Something to think about the next time you’re waiting in line.