You heard us, penis fencing, that's what a newly discovered species of flatworm does with its spare time. We remember when flatworms had a degree of self-respect, a little class, but not today's flatworm, they're all about making a big show with the penis fencing. Watch a video of this in action. That's right, a hot, hot video of flatworm penis fencing. After you're spent, read about them a little at We Make $ Not Art, from which we're getting this from.

With thanks to Susannah