@codinghorror The book “how babies are made” - which I am astounded and pleased to learn is still available https://www.amazon.com/How-Babies-Made-Steven-Schepp/dp/1626541043 - was a genuine favourite bedtime story for my sister and I from before I can even remember. The paper cut-out pictures are absolutely adorable and amazing works of art in their own right.
(It probably helped that the book uses cocker spaniels for some parts, and my mother used to breed them...)
So, I was well versed in the theoretical mechanics of it from a young age, and aware of contraception. But I was utterly unprepared for emotional connection!