I stand corrected - I drifted off my own thread! Of course, different things work for different genres, and the Procol Harum example was not appropriate.
And I was wrong too in using the word "rule" - I meant "guideline", or "useful advice".
I do stand by my summary further up, by the way - and certainly by the rule (sorry, good practice) of telling a story that others can relate to. I am just traditional in that way, I guess; I was simply playing devil's advocate with my unfortunate PH example.
I'll go and do one hundred "kyrie eleison" in the corner. Now where did I put the dunce's cap...