Oh! I use "Long, long, time ago" for Ned and Chuck because it has a sort of "beginning again" feeling to me. And it reminds me of how Ned and Chuck are rebuilding their relationship, and all their earlier trust and puppy love is buried by other issues. And also, because Ofelia hums during "Long, long, time ago" which adds a touch of childhood whimsy to it all. Erm, does that make any sense?