A Coat

“A Coat,” a poem by William Butler Yeats.

I made my song a coat
Covered with embroideries
Out of old mythologies
From heel to throat;
But the fools caught it,
Wore it in the world’s eyes 
As though they’d wrought it.          
Song, let them take it           
For there’s more enterprise           
In walking naked.

What happens to a creative work once it’s been “released into the environment”? To whom does it belong?