"Ahhh..~" Mahito ate the soup that you handed him for his cold, obviously enjoying it; Curses didn't need to eat, but after getting chased by Yuji and almost dying, maybe eating would make him regain his energy.

He sneezed- since well.. he caught a cold.

He glanced at you, who was also eating a bowl of soup. You were taking care of him... you probably didn't know about the existence of curses.