Tim Jaques mentioned a cruel Irish song, here it is (well, my version is one of many, even the titles are different)
Weela Wallia (aka Down by the river Sallia aka Down by the river side-O)
1. There was an old woman who lived in the woods, weela weela wallia,
there was an old woman who lived in the woods, down by the river Sallia.
2. She had a baby three months old...
3. She had a penknife three inch long...
4. She stuck the knife in the baby's head...
5. The more she stuck, the more it was dead...
6. There were three knocks a-knocking at the door...
7. Two policeman and a man were there...
8. Are you the woman that killed the child...
9. Yes I am the woman that killed the child...
10. Then she got tried and she got hung...
11. The more she hung the more she was dead...
12. The moral of that story is...
don't stick knives in babies' heads...