The touch was surprising. He hadn't met many people here in the City, yet, and the only ones who ever really touched Leto Atreides in his past life were Ghanima and his stepmother -- mostly Ghanima, though. It wasn't foreign, the sensation, but strange to him all the same. He didn't break contact, but it took a second for him to adjust.
"You're right," he said in answer to the Doctor's observation. That's all he said, however. He'd already learned long ago that the fewer words he used about his inborn gifts, the better. "About all of it. There's much more to this City than what you see now. I've been here only a few weeks, and I'm still learning, myself."
And then Leto shared as much as he'd gleaned -- the fact that the City was a living entity, though not wholly organic. The truth that the ones who were pulled here provided the City with protection and power by their presence. That many were pulled from many universes and times. That there was no way yet discovered to leave. That they were tended to, and that whatever wasn't given to them outright, they had the ability to get in the City anyway.
Leto did not tell the Doctor about the spice, or how it'd simply been in his apartment. He didn't tell him about Oswin, either.
"I imagine," he said at last, "If you check your pockets, you'll find a key or some other clue as to where you've been given a place to stay."