Where do all the trout souls swim to?

Here, amongst the weeds, we love the poetry of Jurgen Gavin. Here's one that always gets my mate, The Cush, creaming his Y-fronts. It's called...Where do all the trout souls swim to?

Where do all the trout souls swim to...
Trout soul, Trout soul,Soul of Trout.
I see the shoals of souls upstream...
Trout soul,Trout soul,Soul of Trout.
Souls of Trout within fast flowing time...
Trout soul,Trout soul,Soul of Trout.
Isn't it...

[Source: 'The Poetry of Jurgen Gavin - Late Trout Period' Faber, 1998]