Louis and Shelby have been married for two years. Recently, they have noticed a strain in their relationship. Louis sometimes interrupts Shelby when she is speaking, and sometimes he dismisses her opinions without considering them. On the other hand, Shelby sometimes makes jokes about Louis's hobbies and interests, which can leave him feeling inadequate. Despite these issues, they both claim to love each other deeply.Which characteristic of a healthy relationship is missing from Louis and Shelby’s marriage?