Once he thinks about it, it starts to make sense - Futsu-no-Mitama is a ceremonial sword, much like Ishikirimaru and Mikazuki, so he probably had little exposure to the mundane. That can't be helped, so any remaining trace of confusion is instantly wiped off his face.

With practiced ease he fills a bowl with rice, dropping some pickled ginger on the top as garnish. He shows it to the other sword for a few seconds before setting it aside, moving on to working on the other dishes.

"Heat is a basic thing for cooking, and boiling things is a very good way of getting things done. There's a lot of technique that goes into it, though, especially for the more complicated stuff."

A pause.

"But we'll start with the basics, of course. Have you been on sorties often?"

If not, they could do it when they're both free.