How Many More Days?

My dutiful slave has been locked in his cock cage for 100 days now. With the time of his release at hand, I've decided to play a little game with him. He will have the pleasure of my hands upon his cock, but there's a catch. For every minute it takes him to cum, I'll subject him to another 10 days in chastity. He thinks he'll cum right away, being locked up for so long. But the thing about a denied cock is that sometimes it's in chastity so long it forgets how to work. Even with my slicked up hands and his balls tied tight against him, his orgasm takes a while to build up. He's already lasted 100 days in the cage. How many more days can he take?