What an interesting gesture! Clearly a sign of affection between two humans, even if one had seemed less than receptive. ZEX would have to remember it later, and perhaps try it on the Captain some time.

ZEX kept his smile and hoped it looked natural. "I'd be glad to accompany you on your search, my Captain." He looked over at him fondly. "With my... limited knowledge of chemistry, I think it's the best option."