The idea that 5 years is a fair expectation for the shelf life of goodness of a romantic relationship is my original idea. It is based on a number of different ideas and observation of people I know. I realize that observing people I know is not entirely valid because my social sphere is not a representative sample.
Leading relationship anthropologist Helen Fisher believes that
serial monogamy is the new normal. Women's preferred mating model is
serial monogamy according to sources with world views as disparate as
feminist oriented PhD Wednesday Martin and
Manosphere writer Caleb Jones (Blackdragon). According to Wednesday Martin, women get bored with monogamous relationships over time, which is why they seek out affairs and divorce. Caleb Jones (Blackdragon)
was exposed by PUA Nick Krauser as a cuck. The fact that Caleb Jones is a cuck discredits some of his ideas, but other ideas are still good, including the two links below.
-By Caleb Jones NRE, or New Relationship Energy, is the strongest positive emotion a human being can feel. Here’s the definition from the glossary: NRE – New Relationship Energy. The temporary, short-lasting, overwhelming feeling of joy one experiences when first dating a new person, usually...
alphamale20.com
I often point to the current high divorce rates as evidence of human beings not being creatures capable of, or even desirous of, absolute long-term monogamy, vastly preferring short-term monogamy and/or temporary marriages instead. Usually I refer to either the “standard” divorce rate most often...
alphamale20.com
Women get bored with monogamous relationships over time, often leading to affairs and divorces. The woman often is the one who files for divorce, though she may not be the one who has the affair, though men and women are starting to have affairs at similar rates. I believe in non-marital situations that women have more affairs than men.
The New Relationship Energy (NRE) concept that Blackdragon mentions is a lot of how I came up with my 5 year shelf of goodness timeline. Initial NRE can be 1-2 years, then the next NRE like spike can occur when a couple moves in together or gets married, and then the next NRE like spike occurs when a baby is born. If the median length of a marriage that fails is 7 years, the majority of people still get married, and a typical timeline from first meeting to the wedding day is 2-3 years, that means the typical marriage that fails is a relationship with a total time duration of 10 years. 10 years would be enough time for initial NRE, newlywed NRE, 1-2 baby NRE, and then boredom and decay. In thinking about that 10 year timeline, that's maybe 5 good years, 2-3 mediocre years, and 2 bad years before someone decides to quit. Sounds about right.