We bought Andrew (4 years old) Amazing You: Getting Smart About Your Private Parts and It's Not The Stork a few weeks back because he'd started asking questions about where babies come from and how he got into my tummy and how he got out of my tummy.

He's been very interested in them and as a result it's been all we've read for weeks now.

He gets that he came from a sperm. He doesn't understand how the egg comes into play. He talks a lot about sperm and where sperm came from the point that he clearly announced to our waiter at supper the other day the following, "I came from Daddy's Testicles".

Awesomest moment ever.

Ever.