Is it harmful for inkstone to lick the pen directly?

This author obviously doesn't pretend to understand! A good inkstone has the saying that it benefits a lot (or that it doesn't hurt much). It's really unnecessary to pour it out on a plate! It makes sense for painters to do this because they need to use different shades of ink, so they use plates to separate them. The author knows what it is, but he doesn't know why, which confuses the usage of calligraphy and painting.