I bet you never learned these crazy facts in history class. They're not the kinds of things you'd learn in schoo,l but they're the fascinating truth!
It turns out that the version of Anne Frank's diary that is taught in school is highly edited. Since Anne wrote her diary when she was going through puberty, there are a lot of entries detailing subjects like menstruation, masturbation, and details of female genitals. This was all edited out by Anne's father, Otto Frank, before he got the diary published in the 1940s.