Even though I've bloodied, black and blue, and marked for almost a month in sessions, the most brutal punishment I've ever endured was swats to the hands with a thick Lochgelly tawse. At the time I had never been hit with a tawse before and my Mistress gave me "six of the best" twice in our session. The second six came after I thought we were finished and I started to mentally wind down. It was shockingly painful.