He doesn't comment. But he smiles, and that's like a comment, right? This isn't about learning the Force anyway, but about the other skills he uses from day to day, and Ben starts giving her a run down of what they're doing and why - where the thread comes from, why pontoon grass if the best option for this, and the best time of day to collect it.

"We'll have to collect more anyway, I never expected I'd have to make a whole new bed so suddenly."

Though he always hoped that some day Luke would want to stay over, he's put that hope aside for now.