Some people, like Leonard Cohen, write one album every 10 years, and labor over a song for five years at a time.
PJ HarveyWhen a poem might become a song, then certain parts are repeated and might become a refrain or a chorus, so they change in that way. But it's more the nature of the words and what they're saying that determines whether it's a poem or a song.
PJ HarveyI think blues music is music of the soul. Of course, there are other forms. You could call some classical music blues music in that way.
PJ Harvey