"Yes. that's exactly it," Bilbo said. "That's why there's always a variety of things -- people don't like the same things. That would be a little boring, wouldn't it?" He offered Thorin a small smile as he spoke, before taking a drink from his pint. "Luckily I am starting to learn what it is you like. ...that's why I felt comfortable enough to bring you food without asking what you wanted."
Because he felt he knew Thorin's tastes in food -- among other things.
Now, though, his stomach was insisting that he should feed it, and that was what he did.