Wet Grinding or Dry Grinding?

According to the encyclopedia of Britannica, grinding mills can be operated both dry and wet. You add water to the crush? Yeah, I just wonder why it helps. It's lubrication. And it helps with like the dust probably. But when you cut into flagstones and things, it helps have a bit of water to kind of... Oh my God. How do you come from? I'm not going to say. Most of them are like massive nutcrackers basically. They're all top loaded because then the pressure from the rocks above acts on the rocks that you're trying to crush down.