This reminds me of:
"Where do babies come from?"
"Grownups!"
"Where do grownups come from?"
"Babies!"
"Where do babies come from?"
"Grownups!"
"Where do grownups come from?"
"Babies!"
"Where do babies come from?"
"Grownups!"
"Where do grownups come from?"
"Babies!"
"Where do babies come from?"
"Grownups!"
"Where do grownups come from?"
"Babies!"
"Where do babies come from?"
"Grownups!"
"Where do grownups come from?"
"Babies!"
"Where do babies come from?"
"Grownups!"
"Where do grownups come from?"
"Babies!"
"Where do babies come from?"
"Grownups!"
"Where do grownups come from?"
"Babies!"
"And now you know"