Jessica Biel remembers the moment it hit her that she just didn't get how her body worked. She was 31—not 13—and she and Justin Timberlake were trying for a baby. "I've been on the Pill for so long; how hard will it be to get pregnant?" she told Glamour. But it was more confusing than she imagined figuring out when to have sex to conceive versus when not. "Suddenly I realized I really didn't know what's going on inside my own body."

So Biel decided to learn about her bod—and now wants to share that info with everyone. The actress has partnered with Saundra Pelletier, the founder of nonprofit WomanCare Global, on a series of unfiltered sex ed videos that will cover everything from puberty to contraception.

[youtube ]https://www.youtube.com/watch?&v=QkBNOH3ysoc[/youtube]

"More than half of our nation's pregnancies are unplanned, and just 22 states require public schools to teach sex education," Pelletier explained. "Jessica and I realized we can help change this."

"We want girls to know what their [body is going through] so they don't feel scared or ashamed or gross," Biel added. The series will have an "informative but also goofy, smart, witty" tone, according to Biel, which sounds nothing like any sex education class we've ever encountered...Sign us up!

Learn more about the series here.