This article contains affiliate links to products selected by our editors. Mental Floss may receive a commission for purchases made through these links. Theodor Geisel—a.k.a. Dr. Seuss—didn ...

I wager that many, if not nearly all, those memorable slogans rhymed. Rhyming is the literary device that most people associate with the works of Dr. Seuss. Rhyme turns out to be a powerful element ...