One of my favorite Beavis and Butthead throwaway gags is when Butthead has to get his braces worked on and it briefly cuts to Beavis reading Highlights for Children in the waiting room and he just says “Heh heh. Yeah. Goofus is cool.”
Or its ploy to make nobody else want the cookies due to having his finger germs, leaving them all for him, cleverly disguised by pretending to just be innocently stupid instead of greedily malicious to lessen the consequences and increase the odds of success.