When the feeling of the bite sinks in
When you realize whose teeth it is
You'll know it wasn't your fault
But you should've tried to stop it

When the days go by
When your teeth grow sharp
You'll grow hungry despite your efforts
But you should've tried to stop it

When the full moon hits your skin
When you feel the fur on your back
You'll be afraid. You'll run.
But you should've tried to stop it

When you find them walking outside
When you let it happen
You'll know
That you should've tried to stop it

(No meaning in particular! Interpret however.)