Summary

Scientific study published in the journal "Personality and Individual Differences" makes the case that female infidelity is rooted in evolutionary biology.

Body

An August 23 U.S. News article cites a scientific study recently published in a journal called "Personality and Individual Differences" to make the case that female infidelity is rooted in evolutionary biology.

Here's a quote from the study, titled "The Mate Switching Hypothesis", cited by article author Rachel Dicker:

"Nothing in life comes with a guarantee. From an ancestral woman's perspective, hazards from the environment, other species, and importantly, other humans, could render her mate debilitated or dead," the study explains. "Mate-switching mechanisms would benefit a woman by motivating her to pursue the highest value partners she could attract and retain."

More RP truths from the lead author of the study Dr. David Buss:

"Breaking up with one partner and mating with another may more accurately characterize the common, perhaps the primary, mating strategy of humans," Dr. David Buss, the lead author of the study, told the Sunday Times. "Affairs serve as a form of mate insurance, keeping a back-up mate should a switch become warranted in the future."

The study also confirms female hypergamous practices, such as "cultivating back-up mates" and comparing and "gauging mate value discrepancies."

Link to the study abstract.