This is restoring a feature that existed in circa 2005 Thefacebook. You could easily browse your friends in various relationship states. Many more people would

This is restoring a feature that existed in circa 2005 Thefacebook. You could easily browse your friends in various relationship states. Many more people would actually set their status as "Single" back then too. Nowadays, in my friend circles, most single people just don't broadcast their relationship status.