What cause tears?
Answers:
The same mechanism that keep your eye lubricated. Some say that the muscular contortions from crying produce this but that doesn't explain that odd split that arrives on my cheek from a touching scene in a movie. not for sure.
The gash ducts around your eyes.
the cleave duct is where the tears come from and they are sent electrical impulse from the brain when pain is involved or electric trauma occurs.
Stupid but serious give somebody the third degree?
Pain.....Emotional or Physical, pain is the root result in....Touchy - Wouchy movie scenes adjectives exhibit pain....
Ohhhh Darling...I know this is going to HURT....but I own to leave you....
Now if you want to know how tears acquire squeezed out....
The tear duct have muscles that control the amount of fluid released...kinda like kinking a hose and nail somebody with it...