Christine teaches you to punish a

Your former teacher orders you to strip and the hands you a leather g-string. Barefoot and almost nude she instructs you to approach her ****.

You find yourself standing between the man's spread legs, staring at his exposed balls when Christine tells you, "You'll start with some punches".

You close your fists tightly, each one only slightly larger than one of his testes.

"Punish him," she orders.

You feel and weigh his balls with your left hand. They are large and warm in your palm. A little reluctantly, you let go and throw a timid punch with your right fist, aiming directly at his scrotum.

You land right in the center of his sac, hitting both his balls. It was just an exploratory blow and the man didn't even flinch. He is obviously used to much harsher punishment.