Not really sex but, I got my period at 8 and was never thought what it was, until I was 13. I got a book, called titeuf et le zizi sexuel I believe, it means Titeuf and the sexual peepee. Titeuf is a famous cartoon character boy in France, kinda like idk gumball. But he is a immature 13 years old boy and the books talks about puberty, and how to make babies in a childish way

I learned sex, periods , and everything.

There was even a hole on the book to put ur finger, and it made a penis, and it was a silly drawing made by kids, really fun book