Men and women alike are looking to fill some hole in their current relationship, it may seem like a trade down to some but to them they feel they traded up, for a time, they got what they felt they were missing out on. I’ve been privy to seeing an awful lot of affairs in my workplace over the past 16 years, co-workers have confided in me when sometimes I really wish they wouldn’t or didn’t, I have seen affairs cost one or the other person everything they had and I have seen domestic issues divide friendships in the workplace.
But for those who have cheated and who have been cheated on, need to look at why there was a hole there to begin with that opened up the relationship to an affair. I know that opinion isn’t going to go over well will some people. I was raised being told that a woman should be there for her husband, physically and emotionally that God intended us to be monogamous, that a marriage should fill each others needs, emotionally and sexually, that communication is the key to a long term relationship. That it is about HIS needs and as long as he is working, bringing home a pay check, isn't hanging out in a bar or hitting you, then all should be good. I think many women are told this, which is why I think women generally work harder at relationships then men.
I’ve know men that specifically target happily married women, they get sex, and no commitment without disturbing their pleasant repertoire at home (whether that be with a spouse or they don't want the stress of a relationship). I’ve know married men who continually seek a romp with somebody other than their spouse just for the thrill or because this married man is seeking a romp because they are not getting it at home. Then I’ve seen good people who tried to work things out, time and time again, stray, when maybe they should have left but didn’t want to ruffle their home life, until that hole got bigger and bigger and they couldn't live with that decision to stay even if it does effect their children and their stability.