Every time another celebrity cheats, we go through the same cycle: We're shocked and appalled -- and then we lap up every detail.
Experts give us advice on how to keep our men faithful. You would think that advice for our husbands would be more useful. (On the other hand, would men read "Comparing You to Gandhi is a Sign of Insanity, Not Love," or "How to Keep 13 Mistresses Happy and Quiet"?)
Eventually, we hear from the excuse-makers: "Everybody cheats," "Monogamy is unnatural," "Males need to spread their seed" and "It's just evolution."
Gentlemen, we have evolved, too. Women who accepted cheating died out a long time ago. The Other Woman is, quite simply, a threat to our children.
Sex makes babies. Babies need food, not to mention years of care. The last thing we want is for our man to make babies with somebody else -- somebody who might want her babies to survive instead of ours.
Jealous women make better mothers. Our pain and anger cause us to take action to stop the cheating -- action that can include things like chasing away the competition or calling in relatives to intimidate, or even (in some extreme criminal cases ) kill the Other Woman. (Killing her would be wrong, of course, but women like "Angry Betty" Broderick might argue it is natural. Kind of like cheating.)
Or, you can make yourself sweet and irresistible to your mate. Or show him your pain, and cry. Or talk about his children, who love him. Or get your friends to tell him to treat you better.
If all else fails, it's time to leave.
Leaving may sound crazy, but a woman may be able to find a new mate who will appreciate her and be faithful. Staying with a cheater just means having more babies with someone who's unreliable. Better to get away from him while you can still attract a better mate.
So there you have it: Somewhere back in the mists of time, pre-human males started falling in love with their mates. Our babies thrived because of their father's care for us. Eventually a woman who accepted a man cheating on her was just a bad mother.
So please, stop wondering why we aren't more open-minded about men who cheat. It's the way we're made. If you cheat on us, you will hurt us. When the pain is too much, we will leave.
We could, of course, use our human intelligence and empathy to control our behavior. So could the cheaters.