Human beings are naturally wired to destroy relationships
This came in as a question in another thread that asked about "pair bonding," and why we feel bonded in our LTR's. There is a lot of fantasy in the main stream world about this. So I am going to to dispel some myths. Our brains ARE NOT naturally wired to reward "pair bonding" for the long term. We are designed to reward pair bonding for a few years, where as we lose desire and eventually mate switch. That is our nature, both men and women, and we execute it in different ways. Keep reading though because I will give you the solution to working around this in order to have exceptionally bonded and happy relationships for decades to come, even though it isn't something we naturally do. Here is the important thing to realize. Our bonding system is designed for us to take care of a girl with our resources and protection within the context of a greater structure (tribe or city state after agriculture) while she is pregnant and while the kid is young. Survival of off spring depended on it BUT only until about age 5. After that the kid can walk and talk and participate in the tribal or city state structure, making the kid survivable within the social structure if parents were to die or mate switch and abandon. So our innate drives are conflicting. We want to fuck multiple women and get them pregnant, and we bond with the ones we FEEL most chemistry with because that chemistry indicates strong genetic offspring potential. And then left to our own devices, we tend to mate switch for different reasons, men and women. If resources of the tribe or your resources in a city state structure were enough to have multiple children with multiple women and feel bonded by desire to those women at least for the first few years, you would. And some of those women would mate switch eventually and have kids with different men and either leave you or cuck you so you end up taking care of another man's kids. There are conflicting theories on this, but this one seems to suss out better than the others when we look at our history, our brain wiring, along with our behavior today. It makes sense from an evolutionary perspective because multiple kids with multiple women (and her with multiple men) meant a higher diversity in genes and a higher number of children surviving, as disease and disability were the main causes of infant death.