MENLO PARK, Calif. — Facebook CEO Mark Zuckerberg changed his status to “married” Saturday and received over one million “likes” from his followers.

But the site he founded isn’t always so marriage-friendly. In fact, lawyers say the social network contributes to an increasing number of marriage breakups.

More than a third of divorce filings last year contained the word Facebook, according to a survey by Divorce Online, a UK-based legal services firm. And over 80 percent of US divorce attorneys say they’ve seen a rise in the number of cases using social networking, according to the American Academy of Matrimonial Lawyers.

“I see Facebook issues breaking up marriages all the time,” says Gary Traystman, a divorce attorney in New London, Conn. Of the 15 cases he handles per year where computer history, texts and emails are admitted as evidence, 60 percent exclusively involve Facebook. The site did not immediately respond to requests for comment.

“Affairs happen with a lightning speed on Facebook,” says K. Jason Krafsky, who authored the book “Facebook and Your Marriage” with his wife Kelli. In the real world, he says, office romances and out-of-town trysts can take months or even years to develop.

“On Facebook,” he says, “they happen in just a few clicks.” The social network is different from most social networks or dating sites in that it both re-connects old flames and allows people to “friend” someone they may only have met once in passing. “It puts temptation in the path of people who would never in a million years risk having an affair,” he says.

Even when extra-marital affairs develop with no help from Facebook, experts say the site provides a deceptively comfortable forum for people to let off steam about their lives and inadvertently arouse the suspicions of spouses.

“The difference with Facebook is it feels safe, innocent and private,” says Randy Kessler, an Atlanta, Ga.-based lawyer and current chair of the family law section of the American Bar Association.

“People put an enormous amount of incriminating stuff out there voluntarily,” he added. “It could be something as innocuous as a check-in at a restaurant, he says, or a photograph posted online.

To read more, go to The Wall Street Journal.