25 Things Only True Childhood Best Friends Understand 22. They know about your first love. 21. And, your first heartbreak. 20. And, the first time you had sex. 19. You have over a dozen embarrassing pictures of and with each other–even from elementary school. Pages: Page 1, Page 2, Page 3, Page 4, Page 5, Page 6, Page 7, Page 8, Page 9