Our inability to handle personal criticism from loved ones is a common Achilles’ heel. The more deeply we love, the more fragile we feel. Soon, couples feel they are walking on eggshells, unable to express themselves honestly, and their love fades. Raising children and money magnify the problems even as they become the reason couples stay together. The result? Couples often remain legally married but psychologically divorced—in a minimum-security-prison marriage. The biggest culprit? Defensiveness. Active listening, a good solution, is rarely used.