Wasnt sure where to put this, Robert Bruce's point of view about dreams and OBEs

[relV]

One thing that still boggles my mind is the issue of dreams and especially "where" they take place.

I have yet to develop a mind set regarding to this matter.. 

Robert bruce in Astral Dynamics refers to a dream mind, saying that the dream is an internal process happening in the dream dimensions, which are different from real time, astral and higher.
So, first of all, if someone could bother to explain his point of view regarding this matter, as I still find it hard to understand, you are thanked for.

Many people talk about dreams taking place in the astral dimension, with the only difference between an AP being the fact that you are creating the whole scenario, characters etc..

I tend to lean towards this point of view but still something inside of me senses something is a bit unaccounted for.
From this perspective, your dream body = your astral body (right?) , and the dream plane = the astral plane. This point of view certainly clears some very demanding aspects of dreams.
Who came up with this point of view and what is it based upon?

The last and only question that really matters is whether you are necessarily out of your body as you dream.

I am grateful for any response. 

Peace & love