Why are Beavis and Butt-Head so dumb anyway?

Posted by Superswiper@reddit | BeavisAndButthead | View on Reddit | 41 comments

I know it's a comedy show, and their stupidity is played for laughs.

But what is your theory in the lore why they are so stupid? I think sometime between the 8th and 9th grade, they received severe head damage. I bring up that timeline, since, well, how would they make it to the 9th grade otherwise?

Again, yes, it's a comedy show, but it's just a fun theory of mine?