Your step-mother has brought you in to my clinic for your first medical milking. While she insists you remain chaste, abstaining for any and all masturbation, she does understand that it's important for a boy's balls to be drained. Let me explain what's going to happen to you: first, we will restrain you. Then we'll give you a little injection to help you relax and become extremely aroused. Once you're good and horny, we'll be milking your prostate through orgasm after orgasm until you're cumming dry. Only when you're totally empty will you be cleaned up and sent home!