Cameron Diaz remains on her nationwide hairy campaign. The actress-turned-author shares an important message about pubic hair in The Body Book. On Monday, she made her latest stop on the campaign trail, Chelsea Lately, so you know there was no filter.

Diaz's new book, The Body Book: The Law of Hunger, the Science of Strength, and Other Ways to Love Your Amazing Body, was inspired by the actress's love of science.

"I'm a science nerd," she admitted to host Chelsea Handler. "I like to know why things work the way they do. I thought that the body was probably the most important thing to understand how it works since we all have one, and we don't really know that much about it."

The 41-year-old actress provides a detailed "diagram of your labia" in the book, according to Handler. Handler has no problem with that as "for me, the vagina is such an integral part of the body."

"We think the vagina is on the outside," Diaz explained. "I say grab a mirror and play along. Get in there."

Diaz is so into vaginas (both figuratively and literally) that she even has a pretty simile for it.

"Learn about it," she continued. "You're supposed to treat it like the beautiful flower that is, the delicate flower that it is, and you're supposed to nurture it in all the ways that it needs nurturing."

Handler agreed, adding that women should water their flowers.

"Yes, watering it, fertilizing it; it needs nourishment," Diaz agreed. "It's hungry."

A highly publicized part of Diaz's new book is her opinion on pubic hair. In the book, Diaz writes that women should keep their lady parts "fully dressed."

"Because it's a science book, and since we used to be covered in hair, and now we're not except for a few places, I figure there's a purpose for that hair," Diaz said on Chelsea Lately. "So I put some of the purposes for it, and I also suggest that no matter how you enjoy grooming it throughout your life -- whether it's shave it all off, wax it all off, put a bulls eye, birthday cake, I don't care -- just, girls, think about not taking it all off forever. Permanency means forever. It doesn't come back. You might change your mind in a few years."

Diaz and her book are not all vagina monologue, however. On Monday, Diaz also discussed managing weight with diets, as well the importance of moderating cigarettes and diet drinks.

"Nothing's for free. My mama taught me that real early," Diaz said regarding sugar-free soda."One cigarette every once in awhile is not going to kill you."

Follow Scharon Harding on Twitter: @SH____4.

Related