Even if the place does stay sleepy and domestic and... surreal, like a little piece of Eden or with really strange creatures in it, there's still the everyday household accidents that could happen. Especially with people occasionally cooking who have never spent much time cooking before... Sam himself included in that list. And there were a lot of stairs at Home to possibly trip on, too.

Sam gives a nod in response to the question.

"Different parts of the body have to be wrapped differently," (just for anatomy reasons, really) "and there are splints and things if you've got sprains or fractures. And for different wounds, different things you should do before wrapping it, even."

Though it would be hard for him to specify what the different kind of wounds look like and how Tsukishima would be able to tell what's what without a textbook. In Sam's education, it had often just been whatever injury Dean or Dad came back with was the one Sam got to learn about. John had occasionally done little sketches too, showed them stuff in his journal. Thinking of, that would be a nice resource to have. It probably would have been with Dean when Sam had died, though.

He turns back to Mark with the same friendly smile. "Could you add in a few standard bandages and pins to my purchase then, please?"