clarence. like oh my loving god. i can handle uncle grandpa occasionally, but clarence is just a show made around the idea of having mentally disabled protagonists. clarence clearly has some sort of autism, jeff has ocd or some stuff, and sumo is most likely autistic as well.
Because you where completely perfect, 100% mature when you where in fourth grade.
None of them show any signs of autism in the show either or you clearly do not know what autism is.