When your partner first promised they would let you orgasm while you were caged, you figured a vibrator would be used or you'd be let out of the cage, however, when they strapped on a dildo and smiled, you knew you were never gonna cum normally again.
I suggest adding a slot machine to this so that the belt opens only if 4 identical symbols appear. And the game time depended on which symbols fell out. From 30 seconds to 30 minutes.