Category "filth"

What does Bruce sing in the hallway?

In Filth (2013), during the scene where Bruce and his partner interrogate the first subject (who sleeps with an uder-aged girl) James McAvoy sings, as he walks

What did Bruce mean by 'same rules apply'?

In Filth, what did the last 'same rules apply' mean? During the movie whenever he used the phrase, I understood this phrase by associating it with the consequ