We hear plenty about eligible men, or men who are “marriage material.” But what makes a woman “marriage material”? This is a more pertinent question since women are the sex that bows out of marriage the most.

Last week, pop star Kelly Clarkson filed for divorce from her husband, Brandon Blackstock, citing “irreconcilable differences.” That may get a big yawn from those who don’t expect celebrity marriages to last, but the framework of Clarkson’s divorce is emblematic of most divorces today: The overwhelming majority are filed by wives who use the vague umbrella of “irreconcilable differences” to get out of an abuse-free marriage.