“Can’t blame me for trying.” She thought a moment, looking around the room, then opened the medicomp and pulled out the rubber glove Samm had breathed into. She brought it near his face, pricked it with a pin, and squeezed it as hard as she could, propelling the air directly into Samm’s nose. He coughed and spluttered, jerking his head to get out of the stream of air, but Kira watched in wonder as his demeanor seemed to grow more calm—his heart rate rose as he reacted to the forced air, then fell again almost immediately as he reacted to … something else. The pheromones. His eyes relaxed, his expression softened, his breathing became more even.

He seemed, Kira thought suddenly, like he was making exactly the same face he’d made in the morning, when he’d agreed to blow into the glove.

“Kuso,” he said. “That’s not fair.”

Kira put her hands on her hips. “What just happened?”

“You’re using my own data against me, and now I—damn it.” He closed his mouth and looked at the ceiling.

“What data?” asked Kira. “The pheromones? Is that what you call them?” She looked at the glove in her hand, now deflated and floppy. “You just told me something you didn’t want to tell me, didn’t you? You’ve never done that—this was a slip. What did the pheromones do?”

Samm said nothing, and Kira brought the glove closer to her face, examining it closely. She walked to the center of the room, envisioning the way it had been laid out that morning—the DORD over here, the table over there, and Samm on top of it. She’d asked him to breathe into the glove and they’d shared something, a moment of … of something. Of actual communication. She’d made a joke about his name, he’d made one back, and then he’d agreed to help her collect a breath sample. He’d trusted her.

And then just now, after she blew it back in his face and asked him a question, he’d trusted her again—not for long, but long enough for his shield of hostile self-control to falter. He’d answered her question.

The pheromones had re-created the trust he’d felt that morning and forced him to feel it again.

“It’s like a chemical empathy system,” she said softly, walking back toward Samm. “Whatever you’re feeling, you broadcast with these pheromones, so that other Partials can feel it too. Or, at least know that you’re feeling it.” She sat in the chair next to him. “It’s like the social yawn: You can standardize one person’s emotional state across an entire group.”

“You can’t use it against me anymore,” said Samm. “I’m not breathing into your gloves.”

“I’m not trying to use it against you, I’m trying to understand it. What does it feel like?”