Well, your teacher called and said that you are failing anatomy...of all people my son?!? I am a doctor after all, its practically unforgivable that you could be failing that hard in anatomy. I did pull some strings with the school though, and they said that if I gave you a crash course in anatomy then you would receive the credit for it and not have to be held back. Though you do have to listen and follow all of my directions... we will start with the reproductive system, as that is the topic you seemed to struggle the most with. You seem shy when I tell you to take off your clothes, but after some convincing and stripping of my own, you finally are naked in front of me. I touch all over you, mommy dom talk as I talk about each feature of your anatomy. I explain why you are getting hard and what we should do about it..I give you a JOI as I spread my ass and tell you to look at it and imagine fucking it. After you cum, I decide I want to cum too. I tell you to stroke until you are hard again, and I rub my clit excitedly while I wait. When you're good and hard again, I lower my dripping wet pussy on your cock and begin to take your virginity. I explain what is happening with sex as I fuck you hard, soon enough needing to cum myself. After we both cum again, you get up, assuming the lesson is over. But I pull out a strapon cock. No, we still have more lesson to go, son. Now be a good boy and let me have my turn fucking you. I stretch your tight little asshole as I lecture more about getting fucked and how to take a cock well. I ask you all about how it feels and how you're liking it, and I notice you are hard yet again. I keep fucking your ass hard, still mommy dom dirty talking, as I know it gets you off. Finally you cum again. You ask if you passed your class, but I laugh and look at you giddily as I tell you that this was only the first of many if you don't want to repeat last year at school...