"My room had a mirror." It stands to reason others probably do too. "But people might not want us walking into their rooms. One of the baths looked like a sentou. Those have mirrors--uh, but we shouldn't walk into there either."

He puts a hand to his chin, furrowing his brow in concentration. There's a lot of mirrors, there's just also a lot of invasions of privacy. "How do you pick which mirror you're going to walk out of?"