I understand that... but, I still think that it promotes the perverse enjoyment of another's suffering in direct correlation with the pain they endure. You don't suddenly get smacked in the mouth with a bat, say 'ouch' and then feel no pain... therefore you feel the pain and you suffer from it.
Also, have you ever actually been beaten up?? From personal experience I can confirm that I suffered greatly, not just from physical trauma but also mental anguish and emotional turmoil, I was terrified, gutted and severely shaken from the event. I suffered long after it happened and I still shudder now when I think of what could have happened. And all the time those girls were laughing, very obviously enjoying my discomfort and getting more than just a physical kick out of it.