"You'd better focus on pleasing ME this time, not on your aching balls. I don't want any mistakes like last month, making me dry off with a lukewarm towel! Do you know what that does to delicate skin like mine? You know better now, don't you?"
"Yes, 6 hours of rubbing your cock with that towel sure brought you from heaven to hell quickly! What was going through your mind when you stopped begging me to stroke it faster and started begging me to stop stroking it? Hmmmm?"