Is Coffee a Necessity for Creative Writing?

 By Thomas KiesI’m hard at work on a new book (almost 240 pages into it) and I’m really excited with it.  It’s dark but not terribly violent and the protagonist, while professing his decency, makes decisions that could be considered borderline illicit. But what I’ve discovered is that the characters are drinking a hell of a lot of coffee.  So, I’m wondering, is it because I