Why “Asshole” Is High Praise—and Other Anatomy Lessons With Mary Roach

More than you ever needed to know about fake poop, rectal smuggling, and weird diets.

Let Mary Roach be your guide through all things digestive. The author of winsome expositions on astronauts (Packing for Mars), cadavers (Stiff), and sex (Bonk) takes on the alimentary canal in her new book (out yesterday). Whether Roach is drooling into a pipette or has her head up her own ass (literally, watching her own colonoscopy), her enthusiasm is downright infectious. Naturally, I asked her to talk about Gulp while forming some grilled-cheese bolusesbolus being the technical term for a chewed up ball of food just before it’s swallowed.

In an otherwise lovely Oakland bar, we discussed rectal smuggling, the ins and outs of making fake poop, and why calling someone an “asshole” is such a great compliment.

Mother Jones: What made you decide to write a book about the digestive system? 

Mary Roach: I was talking to a physician reader, and he got to telling me about the anus, which is this amazing thing that nobody appreciates. Here’s this ring of muscle with nerves that has to discriminate between solid, liquid, and gas, and let it out accordingly. He’s like, “No engineer could design something as multifunctional and fine-tuned as an anus. To call someone an asshole is really bragging him up.” That was the moment I thought, “Oh yeah, this could be an interesting book.” 

MJ: In the book, you go to prisons and talk about prisoners smuggling things in their rectumsup to three smartphones at a time! How did you find a guy willing to talk so openly about his rectum?

MR: It was surprisingly easy. I sent an email one day to the California Department of Corrections and Rehabilitation and because smuggling contraband, particularly cellphones, is such a problem, he said, “Yeah, come on down and I know just the prisoner for you.” And he goes, “Will four hours be enough?” I was like to talk to a stranger about his rectum? Yeah, I think four hours is good.

MJ: And the prisoner was totally willing to talk?

MR: I think it was a welcome diversion and a little bit of pride. Everybody does it—it’s like sticking something in your pants pocket. They showed me a videotape from the visitor’s room: There’s a guy sitting with his young son and his wife. The wife hands him something, and the son is right there playing a board game. And he just reaches back—it’s like he’s putting his wallet in his pocket. That’s it. Boom. Done. They’re very smooth.

MJ: One of the funniest things in the book is that you go through these old diet fads that seem totally ridiculous, like the one where you chew each bite hundreds of times—

MR: You know what’s amazing, though? That one came back! They call it chewdaism. It all comes back; they all come back. It’s unreal. Every crazy fad from the 1800s comes back or they never go away. It’s like fashion, like everything’s already been invented, and somebody stumbles onto it and people will always, always be looking for an answer for some vague illness they can’t get a diagnosis for.

MJ: You talk about how we make tons and tons of fluids in our own bodywe swallow pints of saliva and mucous everyday. That’s not gross, but as soon as a bodily fluid is outside of us, it suddenly becomes very gross. 

MR: I found that fascinating—the boundaries of the self. Bodily fluids and solids are universally the most disgusting things we as human beings can come upon, but as long as they are inside us, it’s part of you. What I really love is that somebody, Paul Rozin, actually tried to figure out the microanatomy of the mouth, like at what point if you have chewed food or saliva on your tongue, does that disgust you? And also people extend them to people that they love: their babies, their lovers. “My husband’s semen, that’s fine. I’ll scarf that down no problem, but anybody else, ugh.” I love that someone actually made that a subject of their research.

MJ: Did Paul Rozin give people questionnaires or was he more, well, hands on? 

MR: He has been known to mix up very convincing simulated dog poop with peanut butter and Limburger cheese for the odor. He was looking at when a child absorbs a cultural sense of disgust. When they’re below about two years ago, it’s very hard to disgust a baby. “Oh I’ll put it in my mouth, bring it over here.” So he gives the kids a sterilized bug, human hair, fake dog poop, but other times he’s used questionnaires. There was another one where he showed people fudge that looked like shit. He told people, “This is fudge, there’s no shit in here.” And they wouldn’t even touch it. Let alone eat it.

MJ: I must have a high gross tolerance as well because I was really surprised that many of the scientists you talk to have never had people interested in their work before. I was so grossly fascinated with all of it. 

MR: For the scientists, they’re kind of puzzled and pleased that somebody finds their work interesting. It makes it fun for me. I feel like I’ve sort of turned over a stone that hasn’t been turned over. Some like gross stone at the bottom of the ocean that nobody wants to go near. 


If you buy a book using a Bookshop link on this page, a small share of the proceeds supports our journalism.

AN IMPORTANT UPDATE

We’re falling behind our online fundraising goals and we can’t sustain coming up short on donations month after month. Perhaps you’ve heard? It is impossibly hard in the news business right now, with layoffs intensifying and fancy new startups and funding going kaput.

The crisis facing journalism and democracy isn’t going away anytime soon. And neither is Mother Jones, our readers, or our unique way of doing in-depth reporting that exists to bring about change.

Which is exactly why, despite the challenges we face, we just took a big gulp and joined forces with The Center for Investigative Reporting, a team of ace journalists who create the amazing podcast and public radio show Reveal.

If you can part with even just a few bucks, please help us pick up the pace of donations. We simply can’t afford to keep falling behind on our fundraising targets month after month.

Editor-in-Chief Clara Jeffery said it well to our team recently, and that team 100 percent includes readers like you who make it all possible: “This is a year to prove that we can pull off this merger, grow our audiences and impact, attract more funding and keep growing. More broadly, it’s a year when the very future of both journalism and democracy is on the line. We have to go for every important story, every reader/listener/viewer, and leave it all on the field. I’m very proud of all the hard work that’s gotten us to this moment, and confident that we can meet it.”

Let’s do this. If you can right now, please support Mother Jones and investigative journalism with an urgently needed donation today.

payment methods

AN IMPORTANT UPDATE

We’re falling behind our online fundraising goals and we can’t sustain coming up short on donations month after month. Perhaps you’ve heard? It is impossibly hard in the news business right now, with layoffs intensifying and fancy new startups and funding going kaput.

The crisis facing journalism and democracy isn’t going away anytime soon. And neither is Mother Jones, our readers, or our unique way of doing in-depth reporting that exists to bring about change.

Which is exactly why, despite the challenges we face, we just took a big gulp and joined forces with The Center for Investigative Reporting, a team of ace journalists who create the amazing podcast and public radio show Reveal.

If you can part with even just a few bucks, please help us pick up the pace of donations. We simply can’t afford to keep falling behind on our fundraising targets month after month.

Editor-in-Chief Clara Jeffery said it well to our team recently, and that team 100 percent includes readers like you who make it all possible: “This is a year to prove that we can pull off this merger, grow our audiences and impact, attract more funding and keep growing. More broadly, it’s a year when the very future of both journalism and democracy is on the line. We have to go for every important story, every reader/listener/viewer, and leave it all on the field. I’m very proud of all the hard work that’s gotten us to this moment, and confident that we can meet it.”

Let’s do this. If you can right now, please support Mother Jones and investigative journalism with an urgently needed donation today.

payment methods

We Recommend

Latest

Sign up for our free newsletter

Subscribe to the Mother Jones Daily to have our top stories delivered directly to your inbox.

Get our award-winning magazine

Save big on a full year of investigations, ideas, and insights.

Subscribe

Support our journalism

Help Mother Jones' reporters dig deep with a tax-deductible donation.

Donate