Why do third party occurs in a relation?

I have to say upfront that not now nor has there ever been a time or will there ever be a time where a third party is involved in my relationship with my husband. This isn't always something that has to be done. I think that two people that really and truly love one another don't need that extra someone hanging around and doing things and to be quite honest, the ones that end up having a third party end up not together because they felt like they were cheated on even though they were involved, were always wondering if the other person was better therefore they were constantly mad or curious all the time, or they don't really care about each other so it's not a big deal to have another person with them. i think it's absolutely disgusting and there is no way that i would let another woman in my bed with my husband. Being married to someone is a bond and commitment between that person and the other, not two or three more. It's a covenant between man and wife and God. Other than that, no one else should be in the marriage bed. for those that aren't married though, it would still be the same way if they really cared about the person. it's no different. Unfortunately there are a lot of men and women that do this and most the time they end up divorcing or splitting up, because they just can't handle it after it happens. It's not all men though...if the woman allows for this to happen, she is just as much a part of it as the man is. thanks for posting and God bless

I hardly think that just "men being naturally polygamous" is any justification for anything; if there's research backing that up, I'd like to see it. I don't think that there's anything any more inherently polyamorous/polygamous about men than there is about women. I actually find this a fairly sexist notion, that men seek out "a third party" (do you mean cheating or something sanctioned by both partners, by the way?) because of a natural inclination, while women would seek the same thing out because of insecurity. Many men are insecure, and many women lust after more than one partner at a time; both of these are common reasons for bringing a third party into a relationship. I've been "the other woman" in at least one case, and while I'm not proud of it, I can look back on the experience and say it was motivated in equal parts by desire and insecurity -- but then again, isn't a lot of what we do in any relationship motivated by those two things in tandem?

There are many factors that can be attributed to it. Its true what you've said by nature men are polygamous but that is not the general truth about men. There are men that stay faithful to their partners. There are times it may start from the partner itself that third parties do occur. One it may be that men do not find their partner suited to their needs that is why they look for alternatives around. It could be that the woman lacks something that the men have found in 3rd party relationship. As I have said there are plenty of reasons that you can find out. Relationship is as complex as your life is.