>>11168816She's almost there. She knows what dicks and balls are, and I hope it's reasonable to assume she knows how vaginas work, but the process of connecting those parts for human reproduction could still be unknown to her. She probably thinks babies come from the stork or some equivalent Japanese urban legend that kids believe.
She's simply too busy being an idol and using her 5000000000000000000000000000000 IQ on things beyond our comprehension to learn about these things.