Pig-Pen is one of the most iconic members of the Peanuts gang, and one of the oldest. Indeed, Pig-Pen has been making readers laugh since 1954, introduced a mere four years after Peanuts first entered syndication. Throughout that time, the famously filthy Peanuts character has been at the center of many jokes. However, arguably none of them can compare to one running gag thats as old as he is, mostly because it shows just how smart the creator of Peanuts, Charles M. Schulz, really was.

In a series of four Peanuts comic strips, Charles M. Schultz tells one long joke with Pig-Pen right at the center of it. And its absolutely hilarious, even by todays standards.

In the Peanuts comic strip published September 8, 1954, Patty is scolding Pig-Pen for how dirty he is. She tells him that no one will admire him if he doesnt clean himself up, and hell essentially...