Google the words "marriage and affair" and you get more than 17 million variations on how to heal. That's because "fidelity in marriage"—which only gets about 3½ million hits—is a hard thing to come by these days.
Some statistics say that roughly 50 percent of married men will cheat, and at least 81 percent won't admit to it even after a woman asks that searing question. It was watching these statistics play out in his practice that prompted family counselor, rabbi and best-selling author Gary Neuman to embark on a two-year study of 100 men who had sexual affairs and 100 men who were faithful. He shared his findings in the new book, "The Truth About Cheating: Why Men Stray and What You Can Do To Prevent It." Neuman spoke to NEWSWEEK's Jessica Ramirez.