The grease on the diner counter always smelled like old pork fat and cheap dish soap, no matter how early you got in there. Arthur liked the corner booth because he said it gave him a view of the whole room, though mostly it just gave him a view of the parking lot where Clara had just parked her faded blue Honda Civic. I remember the weather was that dry, dusty kind we get around Wichita in August, when the gravel road outside kicks up a gray cloud that settles right on the tomato plants.

Clara had come inside five minutes earlier with her eyes red and her jaw set so tight I thought she might crack a tooth. She didn’t say a word to either of us, just dropped her car keys on the oilcloth table and walked straight back out to the gravel lot because she couldn’t stand the heat inside the dining room. Arthur didn’t even look up from his crossword puzzle right away. He just licked his thumb, turned a page of the Wichita Eagle, and took a slow sip of his lukewarm decaf.

I was wiping down the chrome salt shaker with a damp napkin, watching the dust motes float in the thin shaft of sunlight coming through the front window. That was when Arthur cleared his throat the way he always did when he was about to give one of his little speeches. He called them life lessons, though most of the time they were just things he clipped out of the paper or picked up down at the hardware store from men who hadn’t read a book since the Nixon administration.

He looked out the window toward where Clara was leaning against the fender of her car, her arms crossed tight over her chest. He shook his head and gave that little half-smile he used whenever he thought he was smarter than everyone else in the zip code. Arthur always loved an audience, even if it was just me and the waitress wiping down the pie case three booths down.

He leaned his elbows right on the sticky laminate and looked at me like he was handing down the tablets from the mountain. He asked me how come nobody ever complains when a man has a dozen women, but the second a girl gets talked about, the whole town treats her like garbage. He didn’t wait for me to answer him, because he never did. He liked the sound of his own voice too much to let anyone else interrupt his rhythm.

He told me it was very simple. He said Confucius figured it all out centuries ago about keys and locks. He told me that when one lock can be opened by three different keys, it is a bad lock, but when one key can open ten different locks, they call it a master key. He said it right there in the middle of the lunch rush with the screen door banging against the frame every time someone came in for a chicken fried steak.

I stopped wiping the salt shaker. The plastic was cold under my thumb, and my hand went completely still on the table. I looked at Arthur, really looked at him, down to the way the gray hairs bristled out of his nose and the little ink stain on his knuckle from his fountain pen. For twenty-two years I had sat across from him at breakfast tables and kitchen islands, nodding along whenever he started in with his little rules about how the world was supposed to work.

The silence between us stretched out longer than it usually did. The diner was noisy with the sound of silverware clattering against ceramic plates and the hum of the old Coca-Cola cooler against the wall, but right around our booth the air felt heavy and thin. I thought about Clara out there in the gravel, only twenty-four years old and trying to build an accounting business while half the boys from the high school football team treated her like public property just because she went out on a few dates after her engagement fell apart.

Arthur reached for the sugar shaker like nothing had happened. He tapped it twice against the glass to loosen the grains and shook two spoonfuls into his gray coffee. He looked back out the window at Clara, checking his watch the way he always did when he wanted someone to hurry up and match his schedule. He thought he had summed up the whole human race in one stupid hardware metaphor about front doors and brass keys.

I didn’t yell. People like Arthur expect yelling because it gives them something to push back against. Instead, I set the damp napkin down right on top of his crossword puzzle, right over the middle of the Sunday crossword where he had been working on a six-letter word for stubborn. He blinked at me then, his hand freezing halfway to his coffee cup with his little pinky finger sticking out the way his mother had taught him back in Missouri.

I told him I was done cleaning up after his philosophy. I told him he could finish his coffee by himself and he could drive his own pickup back to the house on Elm Street because I wasn’t riding in the passenger seat another minute. I said his little Confucius story didn’t make him wise, it just made him small. He opened his mouth to say something back, some sharp little comeback about how I was getting too sensitive in my old age, but the words kind of died in his throat when he saw the look in my eyes.

I walked out past the pie case without looking back at the waitress or the men at the counter. The screen door slammed behind me with a loud metal snap that made the whole front porch rattle. The heat hit me like a wall of wet wool, but the Wichita air felt cleaner out there in the gravel than it ever did sitting across from Arthur in that corner booth. Clara was standing by her passenger door with her keys in her hand, looking at me like she wasn’t sure if we were about to cry or start laughing.

I walked right up to her, took her by the elbow, and told her to open the driver’s side door. She didn’t ask what happened inside, and I didn’t need to explain the lock or the key or any of it. We got into that little blue Honda, and when the engine finally turned over with that familiar rattling cough, I didn’t look back at the diner once.