We sometimes get push-back regarding our Personal Health Program discussion of natural human pair-bonding. Though the science on this issue is not fully settled, there is good reason to believe that humans in the wild became at least more monogamous as we became more intelligent (and required more parental care as children to reach adulthood). This model of natural coupling predicts that humans today will prefer and do better with monogamy, even when this behavior is less strongly demanded and acculturated (e.g. since the 1960s in Western societies), and this appears to be the case. An interesting discussion of some recent research and current trends in coupling is available at Digital Age Coupling.
HumanaNatura 