system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are tears shed when crying?

Why is it that when enthralled with emotion, water comes out of my eyes? I get tears needing to lubricant and moisten eyeballs but why the excess when someone is sad or upset? Is there an evolutionary advantage?   

EDIT: Spelling.
gpt
"Is there and evolutionary advantage"

Well it's a lot easier to indicate that you are sad/need attention (as a child) if you're crying. When mothers see their young cry they get triggered by hormones and gives the child attention, and a caring mother means a higher chance of survival.

It's basically a signal to other people around you that something is wrong.