I always heard it as "My heart is open wide". Derp.
Coincidentally, that's twice now that I've misheard a "flat-line" verse. I originally heard "And then I heard you flat-line" from Not Gonna Die as "And then I heard you flood me". Yeah... the lyrics in my head don't seem to make much sense most of time...
Oh yes! Especially the last line of the bridge: "you remind me of a time, when I felt alive!"
I like the sound, but I still haven't been able to pin down exactly what the song is about. Little help?
A slow song, but I really like it. All of their Deluxe songs are great IMO (funny how that works).