Written in the meta-data

Is it possible to identify an individual’s romantic partner on the basis of his/her social networks alone? That’s the question Jon Kleinberg, a computer scientist at Cornell University and Eric Bakstrom, a senior engineer from Facebook, teamed up to answer. After analyzing millions of Facebook data points, they came up with an affirmative response in Romantic Partnerships and the Dispersion of Social Ties: A Network Analysis of Relationship Status on Facebook -- they assert the answer is yes with a 60% probability. 

Read more in Your Romantic Attachments as Predicted by Metadata