Humbler (Cock and Ball Torture)
A humbler (Cock and Ball Torture) is a BDSM physical restraint device used to restrict the movement of a submissive male participant in a BDSM scene. The humbler consists of a testicle cuff device that clamps around the base of the scrotum, mounted in the center of a bar that passes behind the thighs at the base of the buttocks. This forces the wearer to keep his legs folded forward, as any attempt to straighten the legs even slightly pulls hard on the scrotum, causing anything from considerable discomfort to extreme pain.
A humbler (cock and ball torture) is kinda like a pair of handcuffs a police officer uses because a wearer is forced to keep his legs forward.