That's the hidden technique actually. A pro artist like you noticed I drew this with my dominant hand. My other (finer) artworks like Optimus Savage, and Fortnight Jonsey, were drawn with the Pencil-Anus Method. I am more proud of the latter picture Fortnight Jonsey. (even if I messed up and spilt ass blood between the "O" and "R" letters." But I digress, For the Pencil-Anus Method the instrument of choice is inserted up the anus. Then the image is draw by hovering over the paper, more muscles in legs as opposed to fingers results in finer motor control. (Don't sit down or you may make a mistake like the aforementioned blood on Fortnight Jonsey.) It takes some time to master this so I alternate between this and more traditional drawing methods.
Thanks for having the eye of a real artist and noticing my subtleties. As a fine connoisseur of the fine arts myself you don't have to tell me about your Shit Technique you are mentioning with this comment. The raw materials are accumulated in the ass and spat onto the canvas. (Come correct later if I am wrong about this...) Going through yo pics I'm excited to see you further develop this skill to somehow even higher levels. The results are Thought Provoking. Anyway, I wont further comment on this as I have nothing to add to a masters skillset like yours, Judging from your pictures I can tell you have mastered Shit Art.