It's sort of like acupuncture for sado-masochists and people who enjoy having sex in dungeons. That's what we gathered from the following blog posts, anyway.
Editorial note: Whoa! You've found a super-old post here on BuzzFeed, from an earlier era of the site. It doesn't really represent where we are anymore, and may in fact be totally broken, but we're leaving it up as a part of our early history.