It's a Brazilian song for kids and John was joking with me, my dear, because the original Nobunaga Oda was a brilliant warrior, a good strategist, but had no patience and, in several moments, acted like a psycho killer.  No mercy.  He killed until the last child of his enemies to have absolute certain they will never grown up and search for revenge.

It would be fun to imagine Oda singing "The History Of A Kitten" for children, but he used to teach his kids to fight until the death, with blood, honor, and no mercy.  Sparta feelings, baby!  ;)

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This song is about freedom, about being really happy.