why do we enjoy poetry From the perspective of neuroscience?

[Belacqua]

yeah they are objects, from this point of view: perceining
But do they have a realistic existence?

I think we have to say they have realistic existence. 

Consider the alternative: suppose you say "I had an idea." And somebody who thinks that ideas don't have existence would say, "No, you didn't." But if you can describe the idea and convey it to others, then the objection that it was just an illusion and didn't exist is silly. 

This is a big problem for materialists, I think. Because the idea itself (or the perceived sensation, or the mind-only speech act, or whatever) does have real existence, but it is not identical with the electrochemical brain event. So what kind of existence it has is difficult to define. 

Sorry if I could not be clear.. this is my first experience to communicate in English 

You're doing fine language-wise! This is just as hard for native speakers.