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Readers acquainted with the recent literature on human sexuality will be familiar with what we call the standard narrative of human sexual evolution, hereafter shortened to the standard narrative. It goes something like this:1. Boy Meets girl, 2. Boy and girl assess one and others mate value, from perspectives based upon their differing reproductive agendas/capacities. He looks for signs of youth, fertility, health, absence of previous sexual experience and likelihood of future sexual fidelity. In other words, his assessment is skewed toward finding a fertile, healthy young mate with many childbearing years ahead and no current children to drain his resources. She looks for signs of wealth (or at least prospects of future wealth), social status, physical health and likelihood that he will stick around to protect and provide for their children. Her guy must be willing and able to provide materially for her (especially during pregnancy and breastfeeding) and their children, known as "male parental investment". 3. Boy gets girl. Assuming they meet one and others criteria, they mate, forming a long term pair bond, "the fundamental condition of the human species" as famed author Desmond Morris put it. Once the pair bond is formed, she will be sensitive to indications that he is considering leaving, vigilant towards signs of infidelity involving intimacy with other women that would threaten her access to his resources and protection while keeping an eye out (around ovulation especially) for a quick fling with a man genetically superior to her husband. He will be sensitive to signs of her sexual infidelities which would reduce his all important paternity certainty while taking advantage of short term sexual opportunities with other women as his sperm are easily produced and plentiful. Researchers claim to have confirmed these basic patterns in studies conducted around the world over several decades. Their results seem to support the standard narrative of human sexual evolution, which appears to make a lot of sense, but they don't, and it doesn't.