Earliest one I can think of is being arrested/captured and stripped. I'd be taken to a prison/facility, where all the prisoners were naked. We'd be forced to do various kinds of labor (mining, etc). Interestingly, this also involved a punishment/torture pretty similar to the wooden horse: the tieing of me such that my weight was on my pussy, which rested on a ridge. This was certainly before I knew about BDSM.