In this funny, casual talk from TEDx, writer Jenna McCarthy shares surprising research on how marriages (especially happy marriages) really work. One tip: Do not try to win an Oscar for best actress.

In this lively, engaging talk, author and humorist Jenna McCarthy reveals that monogamy is wholly unnatural, soul mates do not exist and technology is killing our relationships. That's the bad news. The good news is that McCarthy has uncovered plenty of practical tips--including the "magic ratio" that can predict divorce with startling accuracy-...