If tickling was a form of torture in the Middle Ages,
I suspect that the anecdotes of each instance of historical tickle torture fall under one of a few categories:
- In the case of the stocks for punishment, it not being the primary vehicle for torture, but just happened to co-occur due to the circumstances. i.e., people were punished in the stocks, and almost certainly there were incidental cases of tickling by passerbys. I don't think it was intended in the design of the punishment.