Like “giving a house key your friends”, Facebook says
Facebook is currently testing a new security feature to its service, Time Reports. The feature is “Trusted Friends”, which would help you out in case you ever lost/forgot your Facebook password. Here’s how it works; you choose three to five friends who you really trust, and should you lose your Facebook password, Facebook will send codes to said friends who will then send you the codes so you can unlock your account again.
Facebook says that its akin to giving your friends your house key. You may be asking, why not rely on password recovery through e-mail? Well Facebook says that in the future, you may not know what e-mail you might be using, and you could just as easily forget your e-mail password
Be good with your friends folks, its Facebook that is at stake here.