Genuine opinion please

Many reasons.

The most common is that, after about two years, many couples know each other's most reliable routes to satisfaction. They repeat the template that works best, and that familiarity and predictability begins to erode the excitement.
When they get into daily domestic routines that increases the same effect. If they start to take each other for granted and not show appreciation, genuine warmth, good will and affection, that begins to tip the relationship into the negative.
If they have kids, that reduces privacy and increases stress and exhaustion, which is a major turn off. It starts to take effort to organise a date and time alone. Some partners fail or forget how necessary that is.
If they start to quarrel and don't learn good communication and conflict resolution skills, the ill feeling will kill their desire for each other. Most people don't learn how to actively listen with empathy either at home or in school, and it's not visible in culture. So the only way to learn is to seek it out and become proactive with daily practise.

Some couples have unequal libido. That's a bad match.

Not all people are raised with monogamy as their moral or ethic - some are polyamorous, polygamous, polyandrous - or just bohemian and free.
It's important not to assume someone's values are the same when dating a new person. If you like them and are thinking of starting something, ask the important questions before getting involved. That includes their relationship and sexual history.

Some situations are exceptional. If a partner becomes ill or incapable of sex, perhaps needing full-time care, it would be cruel to expect the carer-partner to be celibate.

Long distance relationships.
Frequent long term absences, for instance, for work.

Some people are born with less oxytocin - they can't bond well. They stray easily and can't form solid long term relationships. One sign is that they show zero jealousy.

Loneliness. Being lonely when alone is terrible but being lonely inside of a relationship is even worse. You have a constant reminder of how things used to be and what you hope they will one day return to. Instead of looking for someone ,like a single person,when you're in a relationship you're waiting for the other person to relieve the state of anxiety emotional neglect brings. That lonliness is mixed with feelings of inadequacy and insufficiency. "I'm not good enough" is often how rejection and emotional neglect are internalized. This leaves the person craving validation from their partner and when that craving goes unfulfilled it becomes easier to rationalize and internally justify cheating.

People marry for the wrong reason. OUr society has become a throw away society. People have ulterior motives such as citizenship, and they need attention.

1. Unmatched expectations.

2. Unexpected changes in life: death/illness in family, personal accident/illness that makes it impossible for one party to fulfill the other party's needs.

3. Unrealistic expectations, mostly assumptions, because the conversation never came up prior to marriage/

4. Life happens: finances, job pressure, kids, friends' opinions on how you should live your life, family's opining on how you should love your life, monotony, lack of communications.

Someone desires a person and that person hasn’t felt desired for a long time. Or some people are just cheating dogs for the thrill of it for some reason.

I think you are asking the wrong question... why does monogamy and wedlock exist. those are the cultural artifacts

I think one reason it happens is when intimacy ceases in a relationship. Eventually people crave it and when an opportunity presents itself they cheat. I'm not saying it's right or okay. It happens.

In the case of my ex… saying stuff like…


Why are you always horny?
I don’t have fantasies and yours are strange.
My gf only has sex with her husband once or twice a month.

I could go on and on.

I've always known, different hairpie is not better!

Stay with who you are with (unless she's Bobbitt) and enjoy the familiar sexuality they attracted you at first!

I’d say most of the time it’s because they’ve lacked attention in their marriage, unless your narcissistic and don’t care 🤷🏼‍♀️

An affair involves at least two people, and as many as four.

If both participants are married, what is wrong with their marriages? That is the kernel of it.

I read an opinion or story or some such that men look outside of their relationship to try to save their existing one - e.g. to get something they're missing from someone else. According to the same paper, women tend to look outside of their relationship when they have decided that it's no longer viable, working, and sustainable.

Everyone have unsatisfied corner inside to explore in search of fulfillment.

I think it is just an itch that some choose to scratch.

they believe the affair will make hem happier @LongHairedCougar

I think there could be many different reasons.
1) 1 person is a workaholic/married to their work and the other feels neglected.
2) I person has a much higher sex drive then the other.
3) Those who always think the grass is greener on the other side of the fence?

So many reasons, right or wrong ??

In my opinion, because attraction can fade over time, for multiple reasons. For some people, it’s something new and exciting, it’s taboo, it feels wrong but right at the same time. And for some people, we want to feel desired, and forbidden fruit is sweeter.

Depends on the situation
Some aren't getting what they need @ home
Some its the thrill of sneaking around and trying to not get caught
Some miss the hunt of finding new playthings
Some just can't be monogamous no matter how hard they want to be

I think people get married for the wrong reasons. Then, when they get bored after not really sharing themselves with each other, they look elsewhere for what excites them.

Sexually motivated usually. The thrill, excitement and danger of being caught.

We want more excitement in life and our lovers dont give us much atttention anymore or they have let themselves go in a few ways

Spme people feel the grass is greener on the other side of the fence 🤷‍♂️

Many reasons as people have said. The reasons are probably as diverse as there are people.

Because men aren't monogamous by nature

How they bouncin'? 😎

They’re horny.

either because they're a horndog, scoundrel, or their wife/husband is gross or withholding sexs. could be anything really.