Wooden horse

The wooden horse or Spanish donkey is a torture device where the victim is made to straddle a triangular "horse" and place their full body weight on their genitals, which rested on the point of the angle which causes pain in the lower regions. Sometimes cannonballs or something similar would be tied to the victim's feet. There is also a less intense variation was probably developed for BDSM play. The Mongols under Jingiz Khan nailed enemies or criminals to the wooden horse, so did the Huns.