No, that concept would definitely be foreign to him. It has yet to occur to him that kindness might motivate her at all. He generally assumes that people operate more or less like himself. He strikes up with people or does things to/for them out of boredom frequently. It's a great way to get things happening.

"You needn't worry about that. But perhaps you'll need a favour someday." This is like some awful parody of the lion and the mouse fable.