You have been complaining lately about how I'm unreasonably cruel, never letting you cum. I guess maybe it's time you get exactly what you asked for! I'll let you cum, but I'm going to make sure you don't enjoy a single second of the experience. You have ten minutes of my precious time, and if you can't orgasm by the end of it, your cock is going back in your pants, blue balls or not. To make sure you remember why you should listen to your Mistress, I want you to stroke it without any lube. No spit, either. Jerk that cock for me dry, and maybe the chafing will remind you that Mistress always knows best.