
Everything seems to be going smoothly, and then suddenly you discover the unthinkable. The love of your life is cheating. If you’re being cheated on, or have been before, you’re not alone. As many divorce lawyers could attest to, it’s a big reason why relationships fail. While most men are faithful, a sizeable number are not. But why do they do it?
They’re immature

Relationships require work, time, financial commitment, and energy. Sadly, some men approach life in a more short-term and reckless way, making poor relationship choices as easily as others make bad financial decisions. Sometimes they just don’t stop to consider if an affair is worth losing their relationship over, and that might be something even relationship counselling can’t fix.
They want an ego boost

We all feel undesirable sometimes, whether it’s because of aging or drinking too many sangrias. Though they may be more about their inability to purchase an expensive car or their desire to lose weight, men can just as easily have deep insecurities. Sadly, when people feel insecure, they’re more likely to seek approval and affirmation from outside sources.
A personal crisis

If a man feels bored, unfulfilled, or sick of his routine, he might be tempted to cheat. This is especially true when men experience a midlife crisis and might want to reclaim their lost youth. Suddenly, the latest sports car becomes more appealing a secure mortgage or any sensible long-term investments. Likewise, a brief exciting encounter could become more tempting than the security of a long-term relationship.
Relationship issues

Recurring or chronic problems might spur your man to seek fulfillment outside of the relationship. So, it’s vital to communicate openly and take action to address relationship issues. Letting issues fester or sweeping them under the carpet to avoid arguments won’t fix anything, and whilst some respond to this by breaking things off or running for a divorce lawyer, others end up committing infidelity.
Social factors

In some social groups, masculinity is characterized by hedonistic behaviors and less-than-positive attitudes towards women. So, men feel pressure to fit in by constantly pursuing women. Combine that with reduced inhibitions, and they may cause him to fall back into his old ways. Whilst a social circle can act as a strong home security system to stop you making bad decisions, they can also do the opposite.
He has commitment issues

Whilst it may be a stereotype, it’s true that men do tend to have trouble making long-term commitments. From investing in moving into property together to popping the question, or even taking out a mortgage together, these problems can rear their head at any point in a long-term relationship. What many don’t know is that these fears can also have a side-effect of making him more likely to “act out” and cheat.
Lack of positive male role models

As humans, we tend to adopt behaviors and attitudes based largely on social factors. In order to develop a healthy mindset when it comes to women and relationships, men ideally need role models who can pass that on to them when they’re young. Whilst there’s always therapy and even online education programs, it’s hard to unlearn unhealthy habits internalized at a young age.
They are emotionally stunted

Arrested development, either through trauma or a lack of consequences for behavior while growing up, can lead to unpredictable behavior later in life. When they lack the maturity to stay in a relationship but feel ill-equipped to handle life alone, they may cheat without considering the consequences. Relationships are a long-term investment, and like real financial investments, not everyone is responsible enough for them.
They’re selfish

Some men are naturally less empathetic than others, and if they don’t seek to rectify this behavior through personal therapy, relationship counselling, or some other means, they will continue being selfish into later years. It’s not that they’re cruel or destructive necessarily, and they can even be good partners to some extent. There are smaller ways their lack of empathy comes through, but the largest is cheating.
They’re only with you for cosmetic reasons

For any relationship to be healthy and faithful, it needs to be built on mutual attraction and trust. However, some men see a steady partner as nothing more than a trophy to use to improve their image or as a no-strings-attached credit card that can solve their financial woes. In this case, it should be no surprise that they’d see no issue with being unfaithful if the opportunity arose.
They have fallen out of love with you

Losing love or lust is something that happens to a lot of people. Some find it useful to work on their issues with their partner, as they’re often temporary and brought on by external factors like stress. Someone less emotionally secure would see this as a sign that the relationship is all but over, and cheat to end it, despite the fact that open communication and marriage counselling are effective options.
They want to hurt you

A surprising amount of cheating is caused by a particular type of insecurity, where they are sensitive to perceived criticism and lack the communication skills to express that sensibly. Instead of clearing up misunderstandings, they blow up into misdirected arguments or a sense of resentment. To make things even, many men choose to cheat.
He’s an addict

Addiction is a complicated issue. Not everybody is going to try gambling and risk ending up in a spiral of high-value losses and questionable loans, but statistically most people are going to have, and very much enjoy having intimate relationships. It goes beyond that for addicts. While plenty of people cheat, the added chemical dependency addicts posses makes it harder to resist.
To ‘self-destruct’ the relationship

The existing relationship can be completely fine, or they may see it as a good insurance policy, and a new person they coincidentally get along with very well presents an alternative. They know emotional or physical cheating is a point of no return, and navigating the current relationship without doing it would be complicated. It’s simpler in a way to just do it and have that excuse just blow everything up.
They want revenge

Specifically, revenge for infidelity, whether it actually happened or they just think it did. The threshold for how much evidence they need to justify cheating on themselves varies from person to person. It could be their partner is acting a little differently, and instead of having a genuine conversation, both partners dance around the issue, which fuels the resentment.
They always intended to

Or rather, they never intended not to, if that makes more sense. They lied, either intentionally or by omission, about their feelings and expectations when starting the relationship. They were in a place in life where they knew they weren’t ready to settle down, but still wanted the benefits of a relationship. Then they told a big fat lie.
They are polyamorous and didn’t realize

There isn’t a direct link between polyamory and cheating, since openly polyamorous people communicate their expectations clearly before taking new partners, something you will often see on online dating sites. Some will feel a sense of shame since the way they are is so at odds with how most people feel about monogamy. These repressed feelings can cause a lot of destructive behaviors.
They think they will get away with it

Some opportunities for cheating will present themselves on occasions where nobody would really find out. The TV show Friends already covered this of course: ‘there’s always a trial’. In reality, traveling for business, going on a luxury holiday without your partner, or even a long-distance relationship all create opportunities. If somebody wanted to, they could cheat quite anonymously.
They don’t agree with your definition of cheating

If one thing is clear from every cheating story, it’s that people have different points where they consider themselves to have crossed a line. This will of course differ from what their partner’s idea of crossing a line means, both for themselves and others. The best way to avoid crossing boundaries is an open discussion with each other, something relationship counsellors often emphasize.
They change over time

Even in relationships where both parties feel satisfied, cheating can still happen. People continue to develop new feelings as they age and mature, and sometimes these new emotions can be destructive to themselves or the relationship. A sufficient enough pull at a particular moment is all someone needs to choose short-term satisfaction over their long-term investment.
It excites them that it’s taboo

It’s fairly common for cheating to be a core part of adult entertainment, where it’s painted as intense, charged, and forbidden. It’s popular because the idea excites a lot of people, and consuming media is a way to indulge in a fantasy. For some, that won’t be enough, and they find themselves drawn to the thrill of infidelity.
Variety and novelty

Are things getting a bit repetitive in the relationship? Sometimes boredom can feel so frustrating, that people do things they ordinarily wouldn’t, like cheat. So, both parties need to take steps to keep the spark alive in the relationship if it’s to last the long haul.
Opportunism

Sometimes, the opportunity for infidelity appears because of circumstances, and men with less moral scruples take it. Men who socialize a lot and spend prolonged periods alone with women at work, for example, may be more likely to cheat and face the consequences.
He was never really over his ex

A common thread in cheating is the involvement of a former partner. It might not be them that they end up cheating with, they just fit the role of a nurturing presence, with the added baggage of having been intimate with them. It offers an easy alternative, a safe insurance policy if their current relationship fails, which is common for cheating anyway, and combines it with the attraction already present.
He’s motivated by jealousy

Some men hold their egos quite sacred and don’t healthily handle negative emotions. One partner being more naturally social and outgoing means they are going to have more close friends to confide in. There isn’t anything wrong with this, but someone who struggles to admit they have been hurt might act out to cause the same jealousy.
He has co-dependency issues

While dating a partner who’s emotionally dependent on you is trading in a risky stock in general, it surprisingly doesn’t mean they can’t still cheat on you as well. It’s not that they were lying about their strong feelings, it’s that codependency makes it difficult to regulate emotions. Their actions could be self-destructive, dangerous, or a way to restructure the relationship to somehow protect it, in their mind.
They want you to find out

This connects with a couple of the points on this list but deserves its own entry as it can be motivated by a combination of factors. Very often, either because of neglect, anger, or jealousy, people seek out opportunities to cheat hoping their partner finds out and ends things. It’s a cowardly but ultimately easy way to not be the one who broke up the relationship, and is a lot cheaper than relationship therapy.
It seems like the only logical option

This is a ridiculous argument. However, many therapists who work with unfaithful partners mention how, when recalled by the man, the sequence of events leads to cheating being their only option. They can’t simply discuss their issues as that would hurt the other partner. It likely will hurt them, but not as much as cheating will.
They believe it’s a man’s duty

Again, as unbelievable as this sounds, marriage counselors hear straight from the horse’s mouth exactly what the stud’s duty is. It’s doubtful they actually believe this and instead are deflecting responsibility onto everything they can. Some men’s attitude towards gender is genuinely driven by the idea that we never developed out of our caveman behaviors.
They have a personality disorder

These are some of the hardest to diagnose developmental conditions, as it requires some kind of monitoring or attention in both early ages and as an adult. It’s likely many people adopt traits of conditions like borderline personality or antisocial behavior without ever realizing it. The struggle with feeling empathy and thinking of consequences could lead to cheating, and it support services as soon as possible.
Personal issues

Whether they have an insecure attachment style, a substance abuse problem, or some other issue, personal problems can increase the likelihood of infidelity for some men. That’s not to say that men with issues will always cheat, rather it’s the case that some individuals will be more likely to make bad choices.
They think cheating is only physical

For as many men who go out and actually engage in relationships with another person, many confine their cheating to messages or pictures. Thanks to mobile phones, the opportunity for these is always present, it also offers a degree of plausible deniability if they get caught. In their mind, as long as it stays confined to social media, they haven’t done anything wrong.
To use women as ‘stepping stones’

Serial cheaters tend to operate a bit like scam artists. They like moving the relationship along quickly so they can extract as much as they can from their partner. This could be financial, emotional, or something more sinister. Once they get bored, they try to initiate another relationship they can eventually jump over to, once the groundwork has been laid.
He confuses lust and love

To be fair, this is a lifelong struggle for men and women. Love is amazing, it changes your life, and makes you a better person. Lust is also amazing, it’s exciting and passionate, it’s fire and chaos, but it’s endlessly confusing. The two very often mix at the start of a relationship, but it takes a lot of work and effort to balance them.
‘Terminal uniqueness’

This is an informal phrase used by psychologists to describe a particular kind of individual. One who believes themselves to be fundamentally different and unique from their fellow man. They might not be able to articulate exactly what makes them mommy’s special boy, but they truly feel it. They feel as though normal relationship rules simply shouldn’t affect them.
He has unrealistic expectations

Men with issues surrounding dependency or attention may have completely wild expectations of the relationship, and their partner’s role. They might feel entitled to 100% of their time and effort, or assume they will be the ones responsible for housework or emotional maintenance. When these impossible standards aren’t met, some will cheat feeling they have been wronged.
They made a mistake

Sometimes, it truly can be an honest mistake. They never went out to do anything, nor do they have any issues with the relationship. However, some combination of a party atmosphere and new people leads to a moment of weakness, which is fine assuming it is just a moment. Some men, of course, start the mistake and think they may as well finish it.
His friends cheat

It’s not necessarily just the social influence of another cheater that makes a man start wandering. Men can easily be influenced by what their friends are doing, whether it’s getting into online stock trading or going on luxury vacations. Whilst those can be an annoyance, it’s all the worse when what they have in common is that they’re unfaithful to their partner, even validating and supporting his habits.
They are repressed

A lot of men feel strong pressure to conform to traditional and outdated ideas surrounding masculinity. A sad effect of this is that many will experience some attraction towards other men, or other feelings they think deviates from the norm, which will conflict with their ego. Without a healthy understanding of these feelings, that conflict drives people to act out.
They have cheated in the past

Figures differ among sources and samples, but around one in five people admit to being unfaithful, which grows as age increases. Serial offenders are difficult to quantify since people tend to lie about guilty-intimate details. Marriage therapists do say that it’s not hard for cheaters to change, but it involves a lot of self-reflection, accountability, and humility to rebuild trust. It’s something that luxury vacation packages can’t fix.