Lyric discussion by nosurfer 

Cover art for Is This What You Wanted lyrics by Last Shadow Puppets, The

In my opinion this song is about the singer's use of steroids in order to stay young for a longer time. The initial parts show how seductive the drug is (You were Marlon Brando I was Steve McQueen) But this use generates a moral dilema since he now isn't his true self (hence living in a house that is hunted, he is the ghost of himself).