NARCISSISTS ARE UNFAITHFUL because they feel entitled to having as many partners as they want for narcissistic supply. They do not see this as being wrong at all. Many narcissists actually hate their partner so much that they use infidelity and sexual degradation in order to punish them for wrongs that the narcissist blames them for. The fact that the narcissist gets married merely to appear "normal" to the world also makes the narcissist despise their spouse — the narcissist sees them as a hindrance. The narcissist further hates their partner because he/she demands that the narcissist be faithful. Fidelity serves no purpose, as far as the narcissist is concerned.

To the narcissist, monogamy feels like a prison. It limits their ability to chase admiration, validation, and ego-boosting encounters. Narcissists view romantic partners not as equals, but as property or tools that exist to serve their inflated self-image. Once the partner fails to maintain the illusion that the narcissist is perfect — by having needs, emotions, or expectations — the narcissist begins to devalue them. Infidelity then becomes a weapon, a form of control and psychological warfare.

They may flaunt their affairs, subtly or openly, to inflict pain. It's not just about lust or boredom — it’s about power. Narcissists thrive on the idea that someone desires them while someone else suffers because of it. Their lack of empathy prevents them from feeling genuine remorse. They may blame the partner for "driving" them to cheat, projecting guilt onto the very person they hurt. The narcissist’s need to dominate and escape accountability ensures that fidelity remains a concept foreign to their emotional landscape. In their mind, they deserve everything — loyalty without giving it, admiration without merit, and freedom without consequence.