Here’s a riddle: What has its own doctor, a million nicknames, is with you always, and can handle extreme pleasure and pain? Your vagina, Virginia, vadge, or whatever you like to call it. It’s the most talked about part of a woman’s body, yet so many women still don’t know that much about it.

Learning the ins and outs of your lady parts will make you more confident in the bedroom. Do you know your stuff? Get your pencil and paper out, ladies. Here’s a little guide to what’s really up “down there.”