Poetry, painting, music, writing can all talk about dreams or be inspired by them. Humans have looked for meaning in them as well as glimpses of the future. Physiologically they are just electrical and chemical actions going on in our brains. Are they controlled by the subconscious ramblings of our minds or just random electrochemical operations firing off whatever and whenever they want?
Beats me! I'm no genius! Sometimes they are pure entertainment and other times I try to figure out if there was a trigger that caused a certain subject, scene, or event to occur in the dream.
One of the most fun things that happens is I get to see old friends. One of my very best friends died in the summer of 1995 of a congenital heart condition. Every now and then he comes for a visit and sometimes we play music or just hang out or go exploring something. Last time he was helping me pick out an area in my huge concrete basement for a music room. At the far end of the basement (it must have been a couple of hundred feet long) was a restaurant and bar run by some other friends. I guess I didn't think much of it other than the convenience factor.
Sometimes my father comes to visit. He died back in 2006, but still hangs around in my thoughts and dreams. It's comforting in a way, now that I'm an orphan.
Of all the songs about dreams I think this is one of my very favorites.
Sometimes dreams come on the wings of an owl (Northern Hawk Owl) and depart just as quickly and in a haze. I remember what it felt like, but the details are gone.