Scientists at the Wake Forest Institute for Regenerative Medicine have done what was once thought impossible: cut off a rabbit's penis, grow them a new one, attach the new one, and get the rabbit laid. Well, that's how science works, right? They can't jump right to humans, that'd be tough to find volunteers. However, now that it works for bunnies, they can move on to people and make whole what was once broken. They appear to be only able to grow the penis itself at this time, from what I can gather, and not the entire genitalia, otherwise we'd be too close to producing an Edward Penishands for my comfort.

Via.