Kaiba takes a deep breath. He's...honestly not immediately sure how to answer.

"...I enjoy it when I'm able to get out of my own head long enough to. And if it will make him happier..."

He flexes and loosens his hand. "I don't easily express myself through words either. If I can learn either that, or how to physically express it better? I'll try. I never want Yugi, or my brother...or anyone else who's earned my care to doubt that."

And then he looks back at Inigo, an odd quirk to his lips like he's trying to joke. "Why, are you piloting lessons?"