What if the entire series is all in Mr. Poopybuttholes head and he's just a Schizophrenic? Since at the end of S8 his wife is telling scientists (or researchers) that she doesn't even know who he's talking to. Plus you've never seen Ms. Poopybutthole have a one-on-one conversation with Rick, and he just uses him and the Smith family to cope with his life? Idk.