Jessica Biel wrote a book about periods

If you're at all familiar with the story of NASA sending Sally Ride into space for one week and asking if 100 tampons would be enough to last her through the trip, then it may make sense why Jessica Biel wrote her debut children's book on the topic of menstruation. 

"People don't talk enough about periods,” Biel said in an interview with PEOPLE about "A Kids Book About Periods," which she hopes will de-stigmatize the topic and educate youth, regardless of their gender identity, before they're out in the world as adults lacking necessary intel. "I’ve always felt strongly that we need to normalize the discussion around periods and as a parent, writing this book felt like an organic way to engage kids in the conversation from early on.”