The Opposite of Correlation. No Relation?

Muffin was quite the kicker in utero. And if I sang/talked, he'd calm down.

Today (and other days), I was wearing him in the Moby wrap and he was sound asleep. I was listening to something for awhile (so, not talking), and then started talking to someone. He began grunting and wiggling. If I stopped talking, he calmed down. Started talking again, much protesting. Quiet again, fell asleep.

WELL, then.