Why do we cry?

[KillaMuvZ]

I was curious to know what triggers the reaction so I did some research and to my satisfaction, I was very interested in what I found.

Apparently, crying is the results of a chemical reaction in the human body as a direct result of an emotion involving pain or sadness. That's reasonable. But what I found interesting was the following.

Thats why newborn babies don't shed tears when they cry. They don't yet have the ability to initiate the chemical reaction needed for tears. Come to think of it, that's a great way to tell if someone is faking crying. If someone pretends to cry but doesn't shed a tear, you'll then know it's most likely not emotional enough for them. However, actors have trained themselves to reference other sad instances in their life to trigger these chemical reactions.

I bet that's a fun fact very few among you knew about. Cheers.

Well actually I can force cry REALLY easily.
I do it all the time to fool my teachers :3
But it is indeed interesting.