I think anyone who has had a long term relationship that didn't work out can relate to this song, it can be hard not to loose your identity and spark when you're with someone for a long time, especially if you're young and naive...
I've recently got into this strange genre, a mix of black metal and Finnish polka music (called 'humppa'), including use of traditional folk instruments. Great stuff. Have a listen to this Finntroll track, if you like it, have a listen to the band Korpiklaani, who are in the same vein and have some fantastic drinking tunes!
This is possibly my favourite Nick Cave song, it's hard to choose one amongst so many great tracks, but there's something about this song, I find the lyrics very powerful for one thing.