We Crave Nutrient Dense Foods
It's not an accident that we prefer fast food to salads, even though we do crave salads from time to time. As hunter-gatherers, it was sometimes difficult to find food, so we consumed food that satiated us and kept us full longer. This is what brought us the most pleasure. The only problem we have in the present is that we don't have to worry about procuring food, it's everywhere and we choose the most convenient method to satisfy our cravings as well as in the case of fast food, it's definitely not a good choice for us.