My dad used to sing a song called "Play in Your Own Back Yard" that used to move me to tears when I was young (in a time when boys didn't do that sort of thing). You don't hear it nowadays -- it's about a black child who isn't allowed to play with the white children, and dies of loneliness as a consequence, and it has the non-PC words (although it's anti-racist at heart). The other night an elderly lady sang a verse of it at the singers' circle; I managed to control the floodgates, but only just.

And, I confess, "Old Shep" used to do it for me too.