Infidelity Lurks in Your Genes
Forty percent of the variation in promiscuous behavior in women could be attributed to genes.
.. Using a virus as a delivery vehicle to transmit the vasopressin receptor gene, it’s easy to artificially boost the number of vasopressin receptors in the brain’s reward center, and make a male vole behave monogamously. The story for female voles is similar except that it is oxytocin, not vasopressin, that triggers monogamous behavior.
.. Oxytocin appears to make us more socially trusting — even in situations where it may not be in our best interest to do so.