Embracing Imperfections

I enjoy drawing with only pen or marker.  How freeing it is.  Pen cannot be erased like pencil.  If I make a mistake there is no fixing it.  You'd think this would add pressure but, oddly enough, it does not.  Pen-only drawings force me to release the need for perfection.  I make it work and most of the time I am very happy with the results.