I invited you to my home because I have a big discussion to have with you. I noticed you've been failing my sex education class. And I will NOT tolerate ANYONE failing my class! First off, I need to make sure you know this topic inside and out. Secondly, my teacher reputation is on the line. I ask what is getting in the way of your grades. You tell me it's your lack of experience. I offer you extra credit - you get to fuck me. And in return, you get an A. I take your virginity and help you through every step of the way.