Crayon??

I was at a clinic recently and one of the free gifts was a nice pen.  The writing end can also serve as a stylus for a touch screen device when the pen is retracted.  So where am I going with this?  The top of the pen is a twist up crayon with a plastic cap that fits over it.  

What's the purpose of a crayon?  Do a lot of college coaches use crayons to mark on their laminated game plans?  It's a cool pen I am just wondering what I am missing when it comes to the crayon feature.  I am trying to figure this out.