I saw a woman with a gold chain dangling from her nasal septum, it looked like gold snot dripping. It was in front of her mouth, she must have had to hold it out of the way to eat.
If you don't buy what you can't eat you can avoid waste and avoid eating date expired food. The time to think about waste is when you're planning your menu and writing the shopping list, not once you've got a pantry full of food you can't eat.