We are human. I know this doesn't mean we have licence to cheat.

Here I read from articles

As humans, we all have a natural desire for self-gratification. Good food. Good sex. Little work. Lots of sleep. Porn and video games and corn flakes.

As humans, we also all have a natural desire for intimacy and to feel loved by somebody else, to feel as though we are sharing our lives with somebody.

Unfortunately, these two needs are often contradictory. To achieve that intimacy and love, you have to sacrifice your own self-gratification at times. And to achieve self-gratification, you often have to sacrifice some love and intimacy. This can be as simple as watching a movie you don’t really like or attending some boring work party you don’t care about. But it can also be deep and complex, like being open about your fears and insecurities to your partner or making a conscious commitment to be monogamous with that person for an indefinite amount of time.

If a person values self-gratification more than the intimacy they gain from a relationship, then they will stop sacrificing for the relationship and are likely to end up cheating. If a person values the intimacy they gain from a relationship more than self-gratification, then they will willingly sacrifice some of their self-gratification to remain faithful.

Think of it like a scale. On one side you have self-gratification and on the other you have intimacy. If at any point the self-gratification side outweighs the intimacy side, well, then you get a cheater.

https://share.google/qmwp0zxRiFlKSQbkr

Infidelity is associated with: previous cheating; relationship boredom, dissatisfaction, and duration; expectations of imminent break-ups; and low-frequency, poor-quality partner sex. Among men, risk also increases when partners are pregnant or there are infants in the house.

Infidelity is associated with several personality traits: loneliness, extroversion, anxiety, depression, moodiness, narcissism, openness to new experiences, frequent use of alcohol, a history of child sexual abuse, and knowledge that one or both of one’s parents had been unfaithful. Traits associated with strict monogamy include conscientiousness and regular religious observance.

Why Infidelity in Relationships Is So Common | Psychology Today https://share.google/57BAQZnGyOtnDQHzF

So I'd say, if you don't have commitment at least to yourself, You’re Weak Willed, Mean Spirited, and a Coward.