Scientifically why is is that when we're sad- we cry?

Question:

Answers:
Tears actually contain stress hormones, so by crying, you get rid of them.

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It's a signal that we need our parents to intervene.

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I don't know, it is just a natural reaction I think. Even worse for me, I cry when I am angry and in a fight or argument with someone. I don't know why, but it is so f**king annoying!

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