“I bet you,” he said to me, “that I can name more states by the time that woman comes out of the dry cleaners than you can.”

I looked at him. We were sitting outside of Joie, both of us on our lunch break, me drinking a Diet Coke, him snarfing down a sleeve of Fig Newtons. “Dexter,” I said, “it’s hot.”

“Come on,” he said, sliding his hand over my leg. “I’ll bet you.”

“No.”

“Scared?”

“Again, no.”

He cocked his head to the side, then squeezed my knee. His foot, of course, was tapping. “Let’s go. She’s about to walk in. When the door shuts behind her, time’s on.”

“Oh, God.” I said. “What’s the bet?”

“Five bucks.”

“Boring. And too easy.”

“Ten bucks.”

“Okay. And you have to buy dinner.”

“Done.”

We watched as the woman, who was wearing pink shorts and a T-shirt and carrying an armful of wrinkled dress shirts, pulled open the door to the cleaners. As it swung shut, I said, “Maine.”

“North Dakota.”

“Florida.”

“Virginia.”

“California.”

“Delaware.” I was keeping track on my fingers: he’d been known to cheat but denied it with great vehemence, so I always had to have proof. Challenges, to Dexter, were like those duels in the old movies, where men in white suits smacked each other across the face with gloves, and all honor was at stake. So far, I hadn’t won them all, but I hadn’t backed down either. I was, after all, still new at this.

Dexter’s challenges, apparently, were legendary. The first one I’d seen had been between him and John Miller. It was a couple of days after Dexter and I had gotten together, one of the first times I’d gone over to the yellow house with him. We found John Miller sitting at the kitchen table in his pajamas, eating a banana. There was a big bunch of them on the table in front of him, seemingly out of place in a kitchen where I now knew the major food groups consisted of Slurpees and beer.

“What’s up with the bananas?” Dexter asked him, pulling out a chair and sitting down.

John Miller, who still looked half asleep, glanced up and said, “Fruit of the Month Club. My nana gave it to me for my birthday.”

“Potassium,” Dexter said. “You need that every day, you know.”

John Miller yawned, as if used to this kind of stupid information. Then he went back to his banana.

“I bet,” Dexter said suddenly, in the voice I later would come to recognize as the one that always preceded a challenge, deep and game show host-like, “that you can’t eat ten bananas.”

John Miller finished chewing the bite in his mouth, then swallowed. “I bet,” he replied, “that you’re right.”

“It’s a challenge,” Dexter said. Then he nudged out a chair, with a knee that was already jiggling, for me, and said, in the same low, slow voice, “Will you take it?”

“Are you crazy?”

“For ten bucks.”

“I am not eating ten bananas for ten bucks,” John Miller said indignantly.

“It’s a dollar a banana!” Dexter said.

“And furthermore,” John Miller went on, tossing the now-empty peel at an overflowing garbage can by the back door, and missing, “this double-dare shit of yours is getting old, Dexter. You can’t just go around throwing down challenges whenever you feel like it.”

“Are you passing on the challenge?”

“Will you stop using that voice?”

“Twenty bucks,” Dexter said. “Twenty bucks-”

“No,” John Miller told him.

“-and I’ll clean the bathroom.”

This, clearly, changed things. John Miller looked at the bananas, then at Dexter. Then at the bananas again. “Does the one I just ate count as one?”

“No.”

John Miller slapped the table. “What? It’s not even to my stomach yet, for godsakes!”

Dexter thought for a second. “Okay. We’ll let Remy call this one.”

“What?” I said. They were both looking at me.

“You’re an unbiased view,” Dexter explained.

“She’s your girlfriend,” John Miller complained. “That’s not unbiased!”

“She is not my girlfriend.” Dexter looked at me, as if this might upset me, which was evidence that he didn’t know me at all. He said, “What I mean is, we may be seeing each other”-and here he paused, as if waiting for me to chime in with something, which I didn’t, so he went on-“but you are your own person with your opinions and convictions. Correct?”

“I’m not his girlfriend,” I told John Miller.

“She loves me,” Dexter said to him, as an aside, and I felt my face flame. “Anyway,” he said, moving on breezily, “Remy? What do you think? Does it count or not?”

“Well,” I said, “I think it should count somehow. Perhaps as half.”

“Half!” Dexter looked at me as if he was just so pleased, as if he had carved me out of clay himself. “Perfect. So, if you choose to accept this challenge, you must eat nine and a half bananas.”

John Miller thought about this for a second. Later, I would learn that money was always scarce at the yellow house, and these challenges provided some balance of cash flow from one person to another. Twenty bucks was food and beer money for at least a couple of days. And it was really only nine bananas. And a half.