Disclaimer: Paramount owns Star Trek and Kia owns the 'Space Babies' commercial. I am not Paramount or Kia.
It had been a long, quiet, boring day on the Enterprise. Even though a fight with the Klingons the day before had crippled their warp engines, all was quiet now, and the ship was moving along peacefully on impulse. Ensign Chekov sighed, stretched, and looked around the bridge. Kirk, Spock, Sulu, Uhura, and a short, skinny security guard named Camiro were all going about their business, but looked just as bored as he was. With nothing else to occupy his mind, a question he had been thinking about the day before came into it. "Hey, Sulu?" he asked, looking at the man on his right.
"Yeah?" The other helmsman turned to look at him.
"Where do babies come from?"
Sulu grinned, but looked surprised when he saw that Chekov was serious. "Aah," he drawled. With a mischievous look in his eyes, he began to explain. "Well, you see, there's this planet. It's called Babylandia. Babylandia IV. That's right. It's filled with babies. Babies of all kinds. And when the time is just right, there's a space launch. They wave goodbye and they beam aboard these big, shiny, starships. They leave their space port and they fly off through space! They get to Earth and penetrate the atmosphere. And then they're released all over the place. Japan, Russia, everywhere. After an amazing nine month journey, they find their moms and dads." Sulu grinned again. "And that, Chekov, is where babies come from."
By now, everyone on the bridge was listening in and all but Spock and Chekov were smiling slightly. Chekov looked confused. "Are you sure?"
Sulu wasn't sure how far he should take his prank, but he answered, "Yes."
"But Captain Kirk said babies are made when moms and dads..." he stopped when Sulu – and the rest of the bridge crew – turned to look at Kirk. The captain looked embarrassed and wisely took that moment to call down to engineering. "Bridge to Engineering."
"Scott here."
"Scotty, are those warp engines repaired yet."
"Aye sir. If she were a bus, her wheels would be turning."
"Thank you Scotty. Mr. Sulu, ahead warp factor five."
Two weeks later an alien vessel appeared on the view screen. "Mr. Spock," began Kirk, "analysis."
It is of unknown origin, Captain. It is about the size of the Enterprise and there are approximately five hundred life forms on board."
"Any idea where it came from?"
"Maybe it's the baby ship!" Chekov chimed in. Why everyone suddenly began to laugh, he could not understand.