What is the song, as a unit, an aesthetic unit? It’s one thing, which you permit to happen again. At most, it’s two things. There’s a derivation of the thing that is actually simply the thing happening for the third (retention, introjecting) and fourth (protentive, extrojecting) times. Then, the fourth time proper.
Anyway, the above is amongst the greatest things. It’s immediately a little tacky, but also mesmerising in its sheer bloody obviousness. But then it’s everything!