When you lock your subby in chastity as often as I do, it's important to always keep him on his toes so he doesn't get complacent. I unlock subby so he thinks he's going to get some pleasure. But then I surprise him with a spike attachment for his chastity cage. I lock him right back up with the spikes poking into him. I tease him and jerk off his locked cock with my fingers. I take out my vibrator and pleasure his locked cock like a girl as he tries not to get too hard in his spiked cage. I can tell he's in pain but I want more. I give him a real mindfuck by fucking his locked cock with a fleshlight. I tell him to imagine it's my pussy and that just makes him harder and in more pain. He begs me to stop but before I do I make sure to ramp up the speed for a bit. It's so painful that he can't even get close to cumming, but over the next little while I will be training him to associate pain with orgasm by making him cum in his cage with the spiked attachment