Perhaps it's because Denzel has set a record: First grown man to enjoy reading Dr. Seuss from the comfort of an leather arm chair while wearing a suit and tie. All that he's missing is a crackling fire and a pipe. Maybe a glass of wine in one hand too. Or would that be overkill? I bet Dr. Seuss's writing would be especially fun for an adult who has had a glass of wine or two.
I'm sure Dr. Seuss would appreciate the gesture of dressing so nicely to read about refusing to eat green food--green food that has no business being green unless you're looking forward to dying from food poisoning. (I know I would be. Except I don't eat ham. Damn, it feels good to be a vegetarian.)