Let me explain. First, you will show an example to the rest of the class that will motivate your peers to emulate your behavior. You might end up with more people spanking the professor in the long term than you would have thought. This will make it entirely confusing as to who should be spanking the professor, which will lead students to spank themselves to settle who can spank the professor's arse. Second, the noise created out of this spank-fest will attract the headmaster that will want to spank everyone for spanking the professor. This will result in everyone's butt being red. Finally, the chaos created by this situation will make no one able to sit on the class chairs anymore. Since no will be able to attend class, everyone will fail because they do not have the necessary knowledge to succeed.