03/28/2011 04:14 pm ET Updated May 28, 2011

Why The Pain Of Romantic Rejection Feels Like A Punch In The Gut

By Alice Park

There are only a lucky few among us who can't relate to the intense pain of being rejected by a significant other. If a breakup is unexpected, it's all the more painful -- it can hurt with such intensity that you can't breathe, as if you've been punched in the gut.

According to Edward Smith, a psychologist at Columbia University, there's a reason for that.

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