One of my three-year-olds was riding his bike around today while loudly making a siren noise. Finally, I was bothered enough to say, "Can you please stop making your siren noise, buddy?"
He looked up at me, dismayed. "No!"
I asked, "Please?"
He excitedly gestured towards his bike. "Well, well, it's just making noises!"
"Oh really," I said. "Are you sure you're not the one making noises?"
He looked at me as if it was the worst logic he'd ever heard. "No, it's my firetruck," he said emphatically.
Oh, of course. Can't argue with that!