I knew a guy that had a bunch of those little silver rings (like people get on the top of their ears) spaced about 1/4 inch apart from his taint all the way through to the head of his dick. That was odd. He actually jingled as he walked like a guy in a western.
Or the guy that had tonnes of piercings like top of ear, ear lobe, eyebrow, nose, top lip, bottom lip, nipple, belly button and then a prince albert. Then a chain connecting all of those up. If he shook his head a certain way, he could give himself a damned good time!
HOWEVER, that's just mutilation and is pretty dumb.