I'm not into SM, but there are times when you have to inflict pain. Wendy went and jammed a splinter into her index finger, sideways, right in the crease of a joint. She couldn't get it out, so I got to dig with the tweezers. The end was an eight of an inch in, so I had to tear a little until I could grab it and haul it out. It is small in reality, but extremely huge when under the skin. The finger picture is after cleaning, but you can still see the path of the splinter, preserved next to the dime:
