The secret to why Ravenclaw’s students get the highest marks.
The magical belts would kick into action every night, stimulating, masturbating and fucking the students until finally the one who’d worked hardest and got the best grades that day would be given a climax – usually ruined unless they’d performed exceptionally.
At the same moment the belts would deeply and painfully penetrate the worst performing students and leave them stuffed and stretched overnight as an encouragement work harder tomorrow.
The belts would be unlocked upon graduation.