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Scientists have studied prairie voles extensively to understand the chemical basis of love. Their exclusive relationships are driven by high densities of receptors for oxytocin and vasopressin—the same hormones linked to bonding and empathy in humans—released in the brain during mating. 3. Gibbons: The Duetting Primates

The loss of a mate can cause severe disruption. In highly bonded species, the surviving partner often experiences measurable drops in health, increased vulnerability to predators, or a permanent decline in reproductive success. Why Animal Romance Captivates Humans www m animal sex com exclusive

Unlike most rodents (which are highly promiscuous), prairie voles form lifelong pair bonds. increased vulnerability to predators