In my area (central VA) I find that the all-caucasian girls don't, the ones with some African ancestry do, and all boys don't. Or no boys do. But I teach my sons as many as I knew (Miss Mary Mack, Miss Lucy had a baby [clean version], etc.), and WE do them, but they don't do those in public. I don't know why it seems to be a "black" thing here, but it does.