Frustration in the marriage is one common trigger; the cheater may make several attempts to solve problems to no avail. Maybe they had second thoughts about getting married or they were jealous over the attention given to a new baby and neither had the skill set to communicate these feelings.
Perhaps the straying spouse has childhood baggage — neglect, abuse, or a parent who cheated — that interferes with his or her ability to maintain a committed relationship. Less often, the cheater doesn't value monogamy, lacks empathy, or simply doesn't care about the consequences. We will take a look at a number of risk factors and causes for cheating, but it's important to point out up front that a partner doesn't cause their spouse to cheat. Whether it was a cry for help, an exit strategy, or a means to get revenge after being cheated on themselves, the cheater alone is responsible for cheating.
• Lack of communication
• Emotional and/or physical disconnect
• Low compatibility (people who married for the wrong reasons): Low compatibility can lead to a sense of "buyer's remorse"
• Domestic violence and emotional abuse
• Financial pressures
• Lack of respect
Body Image/Aging: Illustrated frequently by stories of middle-aged men having an affair with women the age of their daughters, cheating may sometimes be a way for a man (or woman) to prove that they still "have it."
There could be any number of reasons. Some might do it because they just aren’t ready to commit to one person, while some just aren’t sure what they’re looking for. Others might be driven by narcissism, sexual compulsion, or a need for validation. I should also note that some individuals simply feel like they can love multiple people at the same time, a practice known as polyamory.
In terms of what the scientific research has to say, you were on to something when you mentioned “survival of the fittest.” The field of evolutionary psychology thinks it is a natural human tendency to desire multiple partners, particularly if you are a man. In fact, research from around the world has shown that men have significantly greater desire for “sexual variety” (i.e., having a lot of different partners) over the course of their lives than women.
However, because the act of producing a child is, undisputedly, simpler for men than it is for women, the sexes tend to approach the mating game very differently. For men, the evolutionary strategy that makes the most sense is to sleep with as many women as possible because this maximizes their odds of having a lot of babies.
For women, though, sleeping around indiscriminately makes far less sense. Yes, it might increase the chances of her becoming pregnant, but keep in mind that having a child requires a significant investment on the mother’s part, not only in terms of the 9 month pregnancy, but also in terms of the resources required to ensure that child’s health and survival after birth.
Women who keep getting impregnated by guys who fail to stick around and help out with the kids may find themselves at an evolutionary disadvantage because they have to provide for themselves and their children entirely on their own (which probably proved exceptionally challenging in the days of hunter-gathers). As a result, the best evolutionary strategy for women is usually to be selective and hold out for a partner who will be reliable.So these reasons scientifically and socially proved to be the main causes why man cheat on thier partner.
