This is so true! When you're thirsty or low on energy, it's so much easier to pull in to the nearest gas station or quick shop to grab a drink than it is to park in a huge lot and walk a quarter mile, stand in line for several minutes, walk back through the hot pavement to your car, to finally quench your thirst.
This is especially true in summer, when folks have less time to shop and just want to get back on the road and back to a fun activity.