Everyone knows that one obnoxious couple who constantly post on Facebook about each other. You know what I'm talking about -- nonstop photos, wall posts and just about any other way you can think of to show public display of affection online.

Guess what? That may be the key to a successful relationship!

Researchers at the University of Wisconsin-Madison found that couples that have their relationship status as "in a relationship" and posted a lot of photos of each other on Facebook are more likely to stay together than those who don't.

"These publicly posted cues likely induced participants to perceive themselves as part of a romantic unit, thus cementing the relationship," says one of the researchers.

So there you go. They make you puke with all their lovey-doveyness, but at least they're happy.

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