Many people assume men have affairs only because something is missing in their marriage, but relationship experts say the reasons are often far more complex. While unmet emotional or physical needs can contribute, infidelity is rarely caused by one factor alone. Personal insecurities, poor decision-making, a desire for excitement, or a sense of entitlement can all play a role, regardless of the quality of the relationship.

One common reason is the desire for validation. Some men seek attention outside their marriage when they feel unappreciated, disconnected, or emotionally neglected. Compliments, affection, or admiration from someone new can temporarily boost self-esteem and make them feel valued again, even if the underlying issues remain unresolved.

Others are drawn by the excitement of novelty. Over time, work, bills, children, and daily routines can replace the passion of a new relationship. For some, an affair becomes an escape from routine or a way to experience the thrill of something different. In certain cases, men may still love their wives and family but pursue affairs simply for excitement or an ego boost—a mindset sometimes referred to as wanting to “have it all.”

Communication also plays a major role. When couples avoid discussing emotional or physical needs, resentment and distance can grow. Rather than working through those challenges together, some people choose unhealthy coping mechanisms, including infidelity. Experts emphasize that while relationship problems may contribute to an affair, the decision to cheat remains the responsibility of the person who chooses to be unfaithful.