[He needs to remind himself that this is still new. Even though three years passed for him at home, it was only a single night for them here. It's difficult right now to grasp how much time has gone by where. He'll ease up, think things through, and try not to hold on so tightly to something that's so much newer than it seems like it should be.]
It would also be unpleasant for you. I hum badly. [He's not nearly as tone-deaf as he thinks he is. He also kind of liked it when Kitty did it and saying so might embarrass her.]