A co-worker told me a few days ago about a group of 4th graders that had come to the dairy farm a few years ago where I work now. And as he was giving them a tour of the farm, some of the kids raised their hands and asked "Why are you doing all this work when you can go to the store and buy milk there?" *facepalm* So sad...most people nowadays don't know where their food comes from, let alone how their food is grown/raised! If you have kids, take them to as many different farms as you can, so they can learn how hardworking farmers grow/raise food to feed the world.
Maybe that one was more the kid thought it was all for personal use rather than not knowing where milk came from