Zach was a bit in shock. Colin hadn't come from a well off family, and he had been on the run, but Zach thought that he would have had at least...something. Hogwarts generally had quite British of food, and Zach liked it, but given that's mostly what Colin had at home, that meant he was a virgin to practically every kind of food there was out there. Bloody hell.
"The world!" Zach declared, "There are so many kinds of food for you to try, it'll feel like you've hardly eaten in your life!" To live without eating more food was strange and unpleasant in Zach's opinion.
"Oh, I'm hungry," Zach agreed, a bit shocked at the question. "It's...a lot easier for me to eat food than to see you." That sort of made sense. "You're distracting, in a good way," Zach added. He meant it. His thoughts were all about Colin.