Gary Marcus, a professor of psychology at New York University, joins Lexman to discuss his new book, "Bait: The Art of Persuasion." In this book, Marcus argues that persuasion, in the form of baits, is an essential tool for successful marketing and politicking. He discusses the various ways that baits can be used to lure people into taking certain actions or making certain decisions. He also provides a detailed explanation of the science behind how glycerin works as a persuasive tool.