Last night, Wolverine (6.5yo, finishing kinder) brought home her art portfolio and was showing me her drawings from the year. One of the pictures, she described as "Pete the cat's girlfriend, and her eggs."
This lead to a 10 minute discussion about human and cat anatomy and physiology, eggs/ovaries/uteruses/periods (yes you bleed every month-ish, no you're not dying), how cats and other animals have a "Y" shaped uterus, and how girls have 3 holes and boys have 2 holes.
That quickly devolved into her yelling at DK, "Hey dad, you only have 2 holes because boys have 2 holes and girls have 3! Mom and me have more holes!"
I'm probably getting a call from school...