Hi to all!
Today I'm gonna introduce a mystic (for me, of course ) topic!
Why drawing with a pen, improve our line?
My teacher told me to do that to clean my line but I wonder why, without any directives, my line should improve?
I'm suppose to be my own teacher with this technique, but I could make it worse than it should be; anyway this technique, magically should improve my line.

The question is: WHY?