Why We Cry: The Truth About Tearing Up The lowdown on tears: Why some cry easily, others don't cry, and how to handle all those tears.

It starts with a quivering lip. Or maybe blinking faster and faster to keep the wetness from escaping.

Before you know it, you're getting teary -- again. 

You may be one of those people who cry at the drop of a hat -- not to mention weddings, birthday parties, your kids' school plays, and the humane society public service announcements showing those adorable dogs in need of new homes.

Or you may be the type who can't remember when you last cried.

Either way, crying often catches the often-teary eyed or the usually stoic off guard -- striking at a time or place where you don't want to weep -- and others don't want to watch you weep.

Just ask New England Patriots coach Bill Belichick, normally stoic, who got teary as he announced the retirement of his star linebacker Tedy Bruschi. Or Hilary Clinton, whose tears one night on the 2008 presidential campaign trail were splashed across TV screens.

Football coaches and politicians crying in public may reflect a society that's evolving to become a bit more comfortable with emotion. But crying in front of people can still be awkward for the person crying and people around them.

What's behind our crying? Why do some people cry so much more or less readily than others? And what's the best way to handle all those tears? Is there a way not to cry when it's totally inappropriate, such as in response to your boss declining that request for a raise?  Researchers and therapists who study crying share what they've learned -- and what still puzzles them.

Why Do You Cry?

The ''why'' of crying may seem obvious and straightforward: You're happy or sad. But that's too simplistic. 

''Crying is a natural emotional response to certain feelings, usually sadness and hurt. But then people [also] cry under other circumstances and occasions," says Stephen Sideroff, PhD, a staff psychologist at Santa Monica--University of California Los Angeles & Orthopaedic Hospital and clinical director of the Moonview Treatment Center in Santa Monica, Calif.

For instance, he says, ''people cry in response to something of beauty. There, I use the word 'melting.' They are letting go of their guard, their defenses, tapping into a place deep inside themselves."

Crying does serve an emotional purpose, says Sideroff, also an assistant clinical professor of psychiatry at the UCLA David Geffen School of Medicine. "It's a release. There is a buildup of energy with feelings."

It can also be a survival mechanism, notes Jodi DeLuca, PhD, a neuropsychologist at Tampa General Hospital in Florida. ''When you cry," she says, "it's a signal you need to address something." Among other things, it may mean you are frustrated, overwhelmed or even just trying to get someone's attention, which DeLuca and other researchers call a ''secondary gain'' cry.