I have found that in my case, it's sort of a counter-productive move. Mostly because once the story bit is out of my noodle and told, I lose a huge part of the required motivation to actually work on it. I constantly rework my own ideas too, so if I happen to change my mind on something, I want to make sure that it comes from me and not from a related outside influence reflected upon the ideas themselves (indifference, a look/expression, excitement, approval, misunderstanding, etc.)