Engineered Penises

They’ve managed to grow full penises and implant them in rabbits. The peni were fully functional and the implanted rabbits seemed to be more horny than non-implanted rabbits, presumably because they needed to check their new equipment worked.

They’re expecting to be able to use this technique for human useage.

Engineered Rabbit Penises Raise Human Hopes | Wired Science | Wired.com.