The whole grading system is dong based.
The F grade represents laughing at how bad it is and that fact that like Arthur in the video is not or ever will be a quality dong.
Like many fucbois, the D grade represents on how fast the process was to get/give the dong, they were too slow to save the movie.
The C grade says they have the materials to make a dong unlike D or F but it’s misshapen, causing you to wonder where is it.
B is to represent that the movie has an efficient dong that you are mesmerized by causing you eyes to light up in awe but it’s not expanded
A means not only do you have a dong but it’s girthy, expanded and pleasing and you’re ready to ride on the top of the movie world, veiny and full of creative juices.