Why Black?

I'm always challenged by the order takers...."you want it black, no milk, just cream?"
"Yes, a BLACK vienna, please."
I remember reading an article in an airline magazine about the opinion of a coffee connossieur which suggested that fancy, milk laden offerings were in fact denigrating the coffee experience. That struck a chord with me as I usually drink black coffee, or, as I jokingly refer to it, "catholic coffee" - black, NUN!
It's only when I'm "out and about" that I'll indulge a black vienna.