Tomas Tranströmer is lost in translation

"I play Haydn after a black day
and feel a simple warmth in my hands.

The keys are willing. Soft hammers strike.
The resonance green, lively and calm." 

Well, that warmth is surely from jerking off, so I get the white of the cum is a symbol for life as the black day is a symbol for death, I see that, but why is Haydn having a boner from all of that ? Soft hammers strike, well that's a nice way to say jerking off senseless. 

After that comes of course the green calm. Smoking a cigarette after such a beautiful monkey slapping is compulsory.