Or even if you have enough money, but you don't want to go to the store right now, or don't have time to do it.It can be a generational thing... but also comes from necessity. If you have no money to buy more food, you figure out what you can still eat & what you absolutely can’t.
If it's the last cheese in the house, and I want a sandwich NOW, of course I'm going to just slice off the mold and then cut a piece of cheese for my sandwich.