It's been 4 months since you locked yourself up and lost the keys to your cage. At first you could resist not cuming, but by month two you got desperate, by month 4 however, you were a regular at the local love hotel and you were well known.
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.
