Clearly you have not visited the far North in winter, where bag milk is commonly frozen into ready made bricks for the construction of temporary snow shelters. That way, when you are trapped inside by the deep snow, you can just suckle on the walls of your home to survive. You have to time this carefully. It's a balancing act to get your supply of milk to last through the melting of the snow in springtime. However, properly done, this ensures a ready supply of milk throughout the winter seasons. Every Canadian child is transitioned from the breast straight to the wall, before they learn to either walk or talk. It's as natural to us as hockey.