Since everyone is hoping to see the groundhog peak his head up out of the hole today, let's take a look at some other things peaking out of their holes - namely cocks and balls. Let's look at these hot peen slips. How am I defining a peen slip? A slip of a cock to the camera that was not 100% intentional. Whether a towel slips, shorts slide, or a cock briefly appears in front of the camera, here are the hottest peen slips.