I wonder if GK version 13 is shooting you in the back of the head with his hornalizer while you sit in those lectures
Are there geeks in your class who feel you are a threat to their relative standing in the grading system, and they need to distract you in order to lower your GPA so they've pulled out their secret weapon? Or are there closet geeks who really, really want you and feel that if they get you horny enough through nefarious stealth technology you will pound their geek bottoms with your rampant manhood? Or less scary, is there something we don't know, such as the total hotness of your lecturer/teaching aide/seatmate?
You haven't posted enough information to really suggest more than what was already posted by others.