What I find weird is that he isn't in more pain, or generally in much worse health relative to his lifestyle. From the state of his teeth in the latest close up alone, he should have been cringing after every pinwheel bite, but instead just perfomed his usual routine of "hell yesh yootoob, this ain't half bad let me tell ya". Drinking anything alcoholic should be torture as well, but I digress.
Could this be a case of the famously high pain tolerance of autistics? He doesn't seem to be on painkillers, unless of course you count booze and duster.