Slap Your Balls for Step-Daddy

You're the professor and i'm your college student and i've been seeing the way you've been staring at my feet so i've decided we're going to play a little game... every time i snap you're going to hit your balls. then you'll say "thank you step-daddy" and worship my feet the way i want you to. sounds so humiliating... doesn't it? yet you're going to do every little thing i say because you crave being told what to do by me. so get down on your knees and get ready.