It has more nicknames than possibly any other female body part (sideways smile, anyone?), its own doctor, and the ability to bring you tons of pleasure -- not to mention pain, particularly if you plan to have a baby. Yet the vagina remains a mystery to many. In fact, a Cosmo poll found that more than 60 percent of women say they don't know a lot about their vadge -- which is unfortunate, because a new study reports that chicks who feel confident about their down-there area have more orgasms. So I've put together a list of 15 bits of info to boost your V-zone comfort level. These are the crucial facts about how it functions, keeping it healthy, and increasing the amount of bliss it brings you.....