To the two people below me.
If you don't like the song or the meaning please don't comment! And turning into a monster can be physical, for example. Vampires. Turning into a vampire (as the myth goes) requires growing fangs and the lust for blood so basicly changing physicaly. Now, this song may not be about turning into a vampire but we wont know. You could alway call Ryan up and ask him.
Just let us fans believe what we want in a song and don't bash it. Waste of everyone's time.