The rule is very simple. Every Sunday I go over to his place. I have to sit still and focus on his cock for five straight minutes.
If I choose to suck it, I’m allowed to do so, and if I do, he’ll also call me whenever he’s horny and wants to fuck someone over the next week.
If I manage to stare at it for the whole time without touching it, he’ll give me the keys to my chastity cage and return control of my cock to me, but I won’t be allowed to suck him.
Every Sunday, I tell myself that being able to cum whenever I want is worth resisting temptation, but every time I end up giving in and taking his cock in my mouth. I’ve only been locked up for eight months so far. I can live with that.