Once upon a time, each of us was somebody's kid. Everyone had a father, even if he never provided anything more than his seed. Everyone had a mother, even if she had to leave us on a stranger's doorstep. No matter how we're eventually raised, all of our stories begin the exact same way. They all end the same, too.
There are also half bricks. . . . As the bricks are always laid so as to break joints, this lends strength and a not unattractive appearance to both sides of such walls.