Few things you probably didn't know about tears

Everyone cries! So i can say that this is essential...

*Biochemically, the composition of tears is similar to saliva.

* Women really do cry more often than men.
One estimate puts it at 5.3 times per month for a woman and 1.4 for
men. Another suggests that women cry two to five times per month,
compared to men's .5 to one. And, according to German research
reported on by The Telegraph, the average crying session lasts six
minutes for a woman, versus two to four minutes for a man.

* Tears come from the lacrimal gland.
And it's found in the outer part of the upper eye. When excess tears
are produced, they drain into small ducts to the nasal cavity. And if
you have too many tears to drain, they'll spill out of your eyes.

* There's an anatomical reason why crying makes your nose run.
"The nose is running because the tears actually go into the nasal
passages," Bylsma says. "Some of them end up in your nose, so your
nose runs."
Those headaches that can creep in after a sob session aren't quite as
easy to explain.

* Syn-propanethial-S-oxide is the reason onions make you cry.
It's a chemical irritant that stimulates the lacrimal gland, which
makes you tear up.
Our tears might be sending signals to others.
At least according to one 2011 study, which showed that testosterone
and sexual arousal take a dip in men after they smell a woman's tears.
"We conclude that there is a chemosignal in human tears, and at least
one of the things the chemosignal does is reduce sexual arousal,"
study author Noam Sobel, a neuroscientist at the Weizmann Institute of
Science in Israel, told LiveScience after the research was published
in the journal Science.

* Crocodile tears are real.
Well, according to one University of Florida researcher, anyhow. Kent
Vliet wrote in a 2007 paper that crocodiles really do cry -- but not
because they're sad. He recorded seven animals, all of whom were
closely related to crocodiles, and noted that five of them teared up
while eating. While the exact cause of the tears was unclear, Vliet
said in a statement that it definitely wasn't grief: "In my
experience, when crocodiles take something into their mouth, they mean
it."

* There may indeed be such a thing as a "good cry."
Me, Tobeetoe have never really cried a good cry, when am happy, i am
happy but Bylsma research is telling us something..
Much of Bylsma's research has focused around the cathartic quality of
crying. And how good you feel after a cry might come down to the
social situation, she says. If you tear up around supportive people in
a comfortable environment, you're more likely to report feeling better
afterward than if you were trying (unsuccessfully) to hold back tears
in a place where you feel vulnerable, unsafe or embarrassed.

* Happy tears aren't all that different from the sad ones.
"One possibility is that happy crying really isn't that different from
sad crying. What both have in common is a period of intense emotional
arousal," Mark Fenske, Ph.D., associate professor in neuroscience at
the University of Guelph, wrote for The Globe and Mail . "Indeed,
brain regions associated with emotional arousal, including areas of
the hypothalamus and basal ganglia, are connected to a section of the
brainstem called the lacrimal nucleus that stimulates tear
production."

* Some people are more likely to cry than others -- but why is less clear.
We know that women are more likely to cry than men, as are people who
have experienced a trauma, anxious people, and people who are
extroverted and empathetic, WebMD reports .
And some of it might simply come down to individual personality
differences. "Some people are just more prone to crying," Stephen
Sideroff, Ph.D., 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., told the
publication. "Others ignore or are not as fazed by certain things
[that provoke tears in criers]."
Source: Tbthealth and Huffingtonpost