Meaning of "Copper (Cu)" by Hooverphonic

The song "Copper" by Hooverphonic uses the element copper as a metaphor for a relationship that starts off shiny and bright but slowly changes over time. The lyrics speak of how neglect and lack of care can lead to the deterioration of the relationship, turning it into something undesirable. The reference to copper turning into green highlights the idea of decay and the loss of the initial glow in a relationship that is not nurtured properly. The bittersweet taste and vicious reaction described in the song reflect the complexities and challenges that come with maintaining a relationship. Overall, the song conveys a message about the need for constant effort and care to sustain a healthy and vibrant relationship, or else it will eventually lose its luster and fade away.