I really like the “for as long as it works” part.
Was that a religious ceremony of some kind or ‘just’ a civil wedding?
The song I picked for my second wedding was not a processional per se, but it was Nicht doof (loosely translated “Not Stupid”) by German band JBO. The male singer sings about how he enjoys somebody’s company because of a list of bad traits she doesn’t have: she’s not ugly, she’s not annoying, her farts don’t smell worse than his, she’s not an idiot etc. The melody is lovely though. The song was in line with the wedding theme, if you can call it that - the main event was a bad taste party at a swinger club, part of which was SO’s idea, which convinced me that she’s the one.