Lyric discussion by samo3113 

Cover art for Mysteries lyrics by Yeah Yeah Yeahs

This song is about her being angry with herself for going back to someone who has been cheating on her. Everyone knows that he's been cheating, and that her secret is that she's totally hooked on this guy, he's her weakness.

andrizzle foo, was that the Denver show? That was one of the best concerts I've seen in a long time, Karen O has an incredible stage presence, and TONS of energy!!

I don't think this is necessarily about a cheater. Could just be a failed relationship where someone moved on way too early, and now she's overextended while he's around town with someone new. I think the "secretest code" could mean the way she feels replaced by this new girl, like her personality is just some simple formula that it turns out is easy to copy