Just because they are fun. And a fun extension of drawing. And of drawing styles that we have done in other media.
Did I mention that it's fun?
The process includes:
A) Cutting out your image after you have drawn it
B) Placing some "weights" on the paper so that the stencil is in close of contact with the paper as possible
C) Spraying a not too thick but even layer of paint
D) Revealing the final results!!!