Infidelity in Russia
In this Slate article, "The Cheating Cheaters of Moscow," the cheating phenomenon is explained, in part, by the "operational sex ratio." Put simply, when there's a shortage of one sex the opposite sex sets the rules. Doesn't matter if it's the animal or human kingdom. In Russia, the shortage of men is a major player in that country's attitudes about infidelity among men.
The same holds true on college campuses in this country, where there's a shortage of men. And it's playing out on in the broader society as well, where there's a shortage of marriageable mates -- equally educated men deemed worthy of marriage. I wrote about this in the Wall Street Journal.
Considering the trend line on college gender gaps, prepare yourself for more of this.