To work on The Simpsons, you've got to be pretty darn intelligent. Many of the writers graduated from top tier colleges with degrees in mathematics and science and it shows (late-night host Conan O'Brien was actually one of the series' first writers, penning classic episodes like "Marge vs. the Monorail", which you can stream right now on Disney+.)
Sure, a lot of the gags on the show are beyond what children can understand, but some are so smart they can be baffling to adults as well. You might be familiar with The Simpsons' most adult gags or its best gags that targeted religion, but these smart Simpsons jokes went over your head decades ago and probably stayed there.
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Sneed's Feed & Seed
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"Sneed's Feed & Seed" was formerly called "Chuck's." Notice that all three words (Sneed, feed, and seed) end with the same sound. Now, replace "Sneed's" with "Chuck's" and follow the pattern, so that "Feed" and "Seed" end with the same sound as "Chuck." Yeah. That's pretty dirty for a sight gag.
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Homer's Opinion Of Rashomon
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In the Season 10 episode "30 Minutes Over Tokyo," the Simpson family heads to Japan after getting some very cheap plane tickets. Homer doesn't want to go, but Marge tries to change his mind by pointing out that he loves Japanese things, including the Akira Kurosawa film, Rashomon.
Homer replies that he does not remember it that way. Rashomon's entire plot revolves around an event remembered differently by different people.
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Paul McCartney's Hidden Lentil Soup Recipe

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Paul and Linda McCartney guest starred in the episode "Lisa the Vegetarian" in 1995. While visiting with Lisa, Paul mentions that if you play the song "Maybe I'm Amazed" backwards, you'll hear a recipe for a delicious lentil soup. The song plays over the episode's ending credits and true to their word, if you play it backwards, you will actually hear Paul read a recipe for lentil soup.
This version of the song was created specially for the show. For those interested:
- One medium onion, chopped
- Two tablespoons of vegetable oil
- One clove of garlic, crushed
- One cup of carrots, chopped
- Two sticks of celery, chopped
- Half a cup of lentils
- One bay leaf
- One tablespoon of freshly chopped parsley
- Salt and freshly ground pepper to taste
- Two and a quarter cups of vegetable stock or water
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Homer's No Soap Radio
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Inside the Simpsons' shower is a waterproof radio, labeled as a "No Soap, Radio!" "No soap, radio" is the name for a kind of surreal practical joke, in which the punch line has no relation to the content of the joke and is seemingly a non-sequitur.
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Andy Williams And Look Magazine
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In the classic Season 7 episode "Bart on the Road," Bart and his friends manage to rent a car and drive to Knoxville, Tennessee, thanks to a fake ID. On the way there, they drive through Branson, Missouri, where bully Nelson Muntz forces them to stop for an Andy Williams concert. The marquee provides a rave review for Andy Williams courtesy of Look magazine, the joke being that Look had been out of business for 25 years at the time the episode aired in 1996.
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Ayn Rand School For Tots
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While Marge is rehearsing for a play, Maggie is left at the "Ayn Rand School For Tots," where a poster can be spotted that reads "A is A." This is a reference to Ayn Rand, and her philosophy of Objectivism. In simple terms, Objectivists reject subjectivity and imagination, which makes the poster hilariously inappropriate for a preschool.