There is an evolution of grocery shopping that occurs during a lifetime, if you didn’t grow up on a farm or hunting shack living off the land. It starts when you’re a kid and your parents drag you along to the Piggly Wiggly, Red Owl or wherever.
They try to ram you into that cold metal seat on the cart, facing the opposite direction of traffic, but it never quite works out. It doesn’t take much kicking and screaming to get mom to let you loose, so you can scamper all over the store and knock things over.
It’s not your fault. You don’t want to be there; you were brought against your will. A tantrum is to be expected.
Also, as long as you are being held hostage on this mission, it only makes sense to grab all the low-hanging snack food and try to use it as a bargaining tool. If mom will simply buy a box of individually wrapped corn syrup wads, you’ll stop tugging on her pants to constantly beg for them. It’s a fair deal.
Eventually, of course, your parents smarten up and lock you in the car. Soon you become old enough to be left home alone, and it’s at that point you enter a long period where you never go to the grocery store. Food is just delivered to you and magically appears in cupboards. This is the halcyon period of your sustenance-acquiring existence.