It's wrong to steal food.
Peter is with his mother at the market when he notices a stand full of delicious desserts.
Peter wants to get some chocolate.
Peter asks his mother if she would be willing to buy him a bar of chocolate.
Peter walks over to the counter and takes a chocolate bar and puts it in his pocket without paying.
Peter's mother agrees to purchase the chocolate bar for Peter and puts it in her shopping cart.
Peter's mother later on notices that he's eating chocolate she didn't pay for and gets very angry.