New Project?? WHY??

Why is it, I am sitting in my chair surrounded by three projects I have recently started and not yet completed, I feel this impulse to look through my past magazine issues to find a new idea?  I love the 100% silk I am working with, as well as the new Merino wool scarf project.  What is it about crafters in general that makes us want to start the next thing??  Are we all a little bit ADD and can't complete 1 project before we start another?  It it as simple as some sort of chemical imbalance in our brains that explains it, or is it the creative side that just wants to keep moving forward?  I love the creative part of my brain but sometimes it gets in the way of the technical side of completeing projects.  If anyone out there has figured out a way deal with both of these issues please, I beg you to step in and help.  I am also quite sure I am not the only one here with this problem.