The news that Dr. Seuss was in real life a big lover of hats will probably surprise no one at all. You only have to have read a very few of his books to have gotten a sense of that: all through his work, hats play a vivid and important role. According to The New York Times they played an important role in his life, too:
He collected hundreds of them, plumed, beribboned and spiked, and kept them