

Adam Mastroianni Aug 18, 2026 629 78 136 Share Article voiceover 0:00 -22:42 Audio playback is not supported on your browser. Please upgrade. photo cred: my dad I owe an apology to every English teacher I ever had. I always assumed that so-called “great” literature was a hoax, a punishment inflicted upon adolescents for the crime of being young. These books did not have anything special about them, and covering up that fact was simply a make-work exercise for former English majors, a sort of “jobs for snobs” program.
I was wrong about this. There is such thing as greatness. More specifically, there is such thing as thickness . Great works of fiction—for that matter, great works of any art—unfurl in response to your attention. The more time you spend with them, the more you get out of them. That kind of responsiveness is so addicting that it can lead people to do crazy things, like try to teach literature to high schoolers.
But thickness is tricky, because rewarding the careful reader often means repelling the casual one. And this is where I would like an apology in return from my English teachers, because while this might have been obvious to them, they never made it obvious to me.
I was presented with art and literature as if it was self-explanatory, and that everything wonderful about it was plainly visible from the outside. But those works were much more like dark, winding caves with treasure stashed inside of them. My teachers were like, “Right, well, into the cave you go!” and I was like “But there’s nothing in there” and they were like “Entering the cave is 30% of your grade” and so I took a few steps into the darkness and I was like “Just as I suspected: an empty cave” and then I came trudging back out and pretended that I saw something.
But if someone had outfitted me appropriately, if they warned me that you have to bring one of those crank-up flashlights and you might have to shimmy through some narrow antechambers and spelunk through some flooded passageways, but that eventually you would reach a room full of untold riches—well, maybe I would have actually tried.
Instead, I had to learn about thickness by looking at a guy’s butt.
For most of my life, I treated art museums like celebrity scavenger hunts. The point of visiting was to see in person the thing you had seen on a screen or in a book; the goal was collection rather than contemplation. And so I would power-walk through the galleries, scanning the placards for famous names, rushing over whenever one of my companions would hiss, “Oh, this one’s a Van Gogh!”
This ended when I encountered The Garden of Earthly Delights , a triptych painted by the Dutch master Hieronymous Bosch. When I went to collect that one, I got stuck. I wanted to stand in front of it forever.
It’s a painting from 500 years in the past that looks like a painting from 500 years in the future. Every corner of it is filled with “freakish riddles” and “irresponsible phantasmagoria”, in the words of art critic Wilhelm Fränger. For example, what is going on with this dude?
In the third panel of the triptych, there’s a scene of some instruments, some naked dudes, and some kind of pink demon with an alarmingly long tongue. Look closely, and you’ll see one of the naked dudes has some music printed on his butt (helpfully, one of his friends is pointing at it, as if to say, “dude you have some music on your butt”).
In 2012, a student at Oklahoma Christian University named Amelia Hamrick noticed the butt music and decided to transcribe it, record it, and post it to her blog, catapulting her to instant worldwide fame.
You can listen to her version here , though of course it sounds better played on the hurdy-gurdy . When I started writing this section, I intended to include this fact as a fun little Easter egg—look how thick this painting is, that it goes to the trouble of writing an actual song on a guy’s hiney!
But it turns out I got this all wrong, and the painting was even thicker than I thought. While researching the story, I stumbled upon three magisterial blog posts by Ian Pittman, an expert on medieval music. He argues:
Hamrick was not the first to resurrect the butt music. It was also done by the Swedish group Vox Vulgaris in 2003 , Atrium Musicae in 1978 (from the LP Codex Gluteo ), and, according to a now-deleted angry comment, by some art history professors in 1981 and 1961, whose erasure from this story has left them quite, if you will, butthurt.
The butt music is not music at all. It lacks a clef, the notes are spaced out randomly, and one of the staffs has a different number of lines. If you try to turn it into a coherent song, you’re basically making things up—or as we would call it if an LLM did it, hallucinating . (Perhaps this is why every rendition of the butt music has sounded so different.)
Bosch intended the butt music to be unplayable. If you look across his works, understand the context of his life, and spend a little extra time inspecting The Garden of Earthly Delights , you realize that Bosch thought secular music was a one-way ticket to hell. (Church music was a-ok, as long as it was for the glory of god and not the glory of the players.) That’s why he depicted so many musicians being tortured: one of them is trapped inside a drum that’s being beaten by some kind of raccoon demon, another is being crucified on a harp, and the butt music guy himself is being crushed by a giant lute. For Bosch, putting actual music on a guy’s ass would be like the FBI handing out copies of the Anarchist Cookbook .
So the butt music is not a secret, but a warning: “If you play music outside of a church context, demons will torture you for eternity.” I find this funny, because I grew up amidst a moral panic over rap music; just imagine growing up in a moral panic over all music. “Oh, your heart will go on, Celine Dion? No, your heart will be torn from your chest and fed to the slavering servants of Beelzebub.”
So that’s what thickness looks like, but what is it? What makes something thick?
There is no straightforward answer to this question, which is what makes thickness both rare and remarkable in the first place. But I think there are four thickening agents worth considering:
Thick art bears the marks of approaches attempted and discarded, a pile of scraps larger than the finished project. For example, here are four versions of the same idea from the artist Hokusai, one produced when he was 33, another when he was 44, another at 46, and another when he was 72, which is the one you’ll recognize. 1
2. Leaving the egg out of the cake mix. The Betty Crocker Corporation could put just egg powder into their cake mix, but they don’t, because cracking an egg into a bowl allows people to pretend that they’re baking . When you present your grandma with a birthday cake, you want to feel like “I made this for you, O Beloved Grandmama” and not like “I dumped a bag of dust into a bowl and heated it up so open wide you old biddy.”
Thick art is like that: it gives you an egg to crack. It leaves space for some essential ingredient you bring yourself, so that the real action happens in your mind, rather than on the page or the canvas or the screen.
This effect is often too subtle to demonstrate in a single bullet point, but here’s an accessible example. The 11th Hour by Graeme Base reads like a normal children’s book at first—oh look here are some beautiful pictures of animals, look at them playing board games, how nice, etc.
Only at the end of the story do you realize that a crime has been taking place under your nose the whole time, and that the clues are hidden in the details of the pictures you’ve just been paging through. The real experience of the book is re -reading the book with this in mind.
Why this word, this scene, this character, and not some other one? Thin art has no answers; thick art does. Sometimes these reasons are known to the artist, and sometimes they are not, much to the delight and employment of Freudians everywhere.
For example, did you know there’s lots of ears in Hamlet? There’s the poison-in-the-ear thing, of course, and characters are always eavesdropping on each other and exhorting each other to listen, but there’s also a lot of talk about ears (“in the porches of my ears”) and number of odd ear-based metaphors (“the whole ear of Denmark”, “like a mildewed ear”). Whether Shakespeare did this on purpose because he had some kind of ear fetish, whether the muse whispered it to him in his sleep (and through what orifice?), and whether any reader notices it—these are all beside the point. The recurrence of these themes and images creates a depth that can be felt even if it isn’t known, and endlessly explored if it is. 2
Humans are mortal, for now. This means all of our actions incur opportunity costs, and so the greater the cost paid to create a work of art, the thicker it can get. There’s no guarantee this will happen, of course, and that risk is part of the thrill.
The Met Cloisters has these wooden altarpieces from the 1400s that draw your attention immediately, I think because the mind can subconsciously calculate the time it must have taken to carve them, and it sends a signal back to the eyes: important . You know that you are not just seeing a work of art, but the expenditure of a life.
( source ) Here’s an even more haunting example. I once saw the magician duo Penn and Teller perform live, and at the end of the show, Penn told us he was going to swallow fire. As he dipped the torch in gasoline, he explained that what he was about to show us is not a trick. Magicians are always saying things like that, but in this case it’s true: there is no sleight of hand the protects the fire-eater from the flames. They get blisters and burns, the fuel drips down their esophagus and poisons them, they suck the hydrocarbons into their lungs and contract “ fire-eater’s pneumonia ”. To watch someone eat fire is to watch someone shorten their lifespan for your entertainment.
“When you leave the theater tonight, you’re going to ask yourselves, ‘How did they do it?’”, Penn said as he lit the torch. “Instead, I’d like you to ask yourselves, ‘ Why did they do it?’“ And then he reared his head back and swallowed the flame.
The other way to understand thickness is to study its absence.
Guys who work in bike shops like to joke about bicycle-shaped objects —sure, that mass-produced hunk of metal and plastic has a seat, pedals, wheels, and handlebars, but that doesn’t mean it’s a bike . When the materials are so cheap and the construction is so slapdash, it deserves another name entirely.
This terminology comes in handy, because it turns out there are also movie-shaped objects and book-shaped objects, art-shaped objects and thought-shaped objects. Just because a series of pictures flickered across the screen and the credits followed, that doesn’t mean it was a movie . Just because it’s printed out and bound in cardboard, that doesn’t mean it’s a book . There is an additional essence that is necessary to turn something from the shape of a thing into the actual thing, and the difference between having and lacking that essence is the difference between a corpse and a person.
This essence is what makes fiction worth reading in the first place, but it’s hard to capture in a paragraph, so let me show you some nonfiction instead, where you can spot the thinness in an instant. Here’s a passage from a self-help book that a friend sent me recently:
You are built to perform under pressure and that is exactly what you will do. Reminding yourself of this changes the meaning of those signs of stress that might otherwise be seen as “symptoms” of a problem. In fact, research shows that simply reminding someone that their performance improves under pressure improves their actual performance by 33 percent (Jamieson et al., 2018).
These sentences crumble immediately upon inspection. First of all, there’s something embarrassing and grat
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