Crying

I wonder what others thoughts are on crying. I understand it's a release of emotion and even physical toxins.

I cry a lot, almost daily. Even if just briefly. Waterproof mascara is a joke.

As humans, we cry when we're sad, happy, lonely, laughing, empathizing with movie characters. Sometimes I cry just as a physical reaction without any emotion attached. Why do you think this is? And why do some people not cry much at all? Is there a way to learn to control tears a little better? The internet says to look up at fluorescent lights to shock the irises out of producing tears or something like that, but I'm hoping someone here has some advice addressing the root of it