I have an ethical question about buying milk at the supermarket. Supermarkets will usually have many rows of bottles of milk on their shelves – with milk that has the soonest use-by date at the front of the shelf, and milk that has more distant use-by dates nearer the back. Clearly the supermarket would like people to take milk from the front, so that the bottles which will go bad sooner are bought before those which will stay good for longer, so that they are not left with unsaleable bad milk. However, as the shopper, I also have an interest in the milk that I buy staying good for as long as possible after I buy it. My question, therefore, is: is there anything unethical about my reaching to the back row for the milk that I will buy? On the one hand, it is out and easy to access (I'm not breaking in to the store room), but on the other hand, they clearly intend the rows to be deplenished from the front. – Many thanks for your answers!