"If this is the first time you've done this, you're doing really well," Ylva says. "Here, careful with the bit there. The skin's really thin there."

This is given as a friendly caution. If he makes a mistake, it won't be a big deal.

"The first city I ever saw was just... overwhelming," she admits. "I found out later that it was a really small one, but it was still more than a hundred people in one place. I didn't know there were so many people in the entire world. And I was... idk, mostly grown when I saw that."