Why Organisational Behaviour is all theory? Why no matter how much I have studied, I still can't fully memorise everything? Can you tell me why?

Gonna find a better and higher pay rate job after exams :D:D
Gonna start my slimming exercise after exams D: D:
Gonna keep on doing all my nonsense exercise before sleep everynight :D:D
Gonna start my stupid OB revision again D: D:

I (Y) OB! like real.