Whenever your hands start wandering downstairs, there's one body part you have to pass before you get to the good stuff. Meet the labia: the fleshy lips that protect the vagina.

In general, it's difficult to know what normal looks like when it comes to body parts that spend most of the day covered: Are yours too long or short? Too plump or thin? Too dark or pale? Too wrinkled or smooth? And when you don't know how yours compare, it's easy to imagine how weird or different your nether regions would look next to someone else's.

Now some women are so concerned about how their labia look, they're going under the knife to change them: The number of people getting labiaplasty—a surgical procedure that reshapes the inner or outer lips—rose by 9 percent