When stricter enforcement is necessary, put your sub in their place with this adjustable wooden humbler. Your sub will be bent over and locked to keep them on their knees and at your complete mercy.
Ingeniously designed to curve and fit below the ass with the scrotum stretched through the adjustable opening. Wing nuts at either end allow you to open and close it. The tugging on their testicles will increase as your naughty sub tries standing up, effectively keeping him bent over.
Measures 13 inches long, 1.5 inches high. Scrotum hole measures 2.75 inches wide and 0.75 inch tall.