"What?" She hadn't expected him to speak, but it was the topic more than anything that had Rose confused. "No, I didn't know that." Was she making him want to vomit? Is that why he was thinking about horses and their inability to vomit? Was he going to vomit in her hair? Did she smell that bad? She couldn't, she'd taken her shower and everything!
"You're not going to vomit in my hair, are you?" she asked, unable to keep worrying about it without voicing it at all. "I would rather you didn't."