We
are accustomed to thinking of sexual infidelity as a symptom of an
unhappy relationship, a moral flaw or a sign of deteriorating social
values. When I was trained as a psychiatrist we were told to look for
various emotional and developmental factors — like a history of unstable
relationships or a philandering parent — to explain infidelity.
But
during my career, many of the questions we asked patients were found to
be insufficient because for so much behavior, it turns out that genes,
gene expression and hormones matter a lot.
Now that even appears to be the case for infidelity.
We
have long known that men have a genetic, evolutionary impulse to cheat,
because that increases the odds of having more of their offspring in
the world.
But
now there is intriguing new research showing that some women, too, are
biologically inclined to wander, although not for clear evolutionary
benefits. Women who carry certain variants of the vasopressin receptor
gene are much more likely to engage in “extra pair bonding,” the
scientific euphemism for sexual infidelity.
The piece goes on in that biologically jargon-y way, but the bottom line is this: infidelity may not be as big of a personal choice as we had thought.
So, go for it! (Unless you don't feel like it.)
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