It’s only natural. Whenever we want to put two things together, we reach for the glue. And there’s nothing wrong about that! But wouldn’t it feel much sweeter and special if you could assemble an object, simply by pressing it into each other like Lego? Most material can do this, if they are shaped properly, and wood is exceptionally good at doing this. ThisWoodwork made this mirror by fitting pieces of wood together. Sure, he used glue for the ornament, but the main construct doesn’t need it. It just fit into each other like they were ment to be together! If the tolerances are good, you don’t need any glue. And if the tolerances are bad, chances are you can fix it with a file or a piece of masking tape!