If you're into Batman, then you know the theory about him and his trusty sidekick Robin, right? If you don't, well, here's the main gist -- they do a little bit more than fight bad guys together.

Apparently you can tell which people believe this by seeing if they have the eternal symbol of this secret society emblazoned on their persons: Batman and Robin in the middle of a mini make-out session.

Now that we think of it, maybe that's not the eternal symbol, but it is what one guy decided to ink into his body. Guess the nipple ring wasn't enough of a statement.