He was afraid of the sound of ticking clocks because the crocodile that ate his hand swallowed one, so every rime he heard ticking he'd freak out and think it was coming back. I'm not sure why I remember this lol.Wasn't Captain Hook obsessed with clocks? Please remind me, I've forgot the details (it wasn't porn, well, except Tinker Bell perhaps).
Anyway, more on topic you can't take this game too seriously, it's pretty tongue in cheek most of the time. Nobody actually thinks the headmaster's methods work except for him, they just want to see teenagers get spanked and groped.