[ Applying an adequate amount of pressure and maintaining the kiss for what seems likely to be adequate - he's determined an average of what the bots have deemed necessary and aims to meet it, adjusting if it does not satisfy that particular bot - and there's the confetti, so he pulls back.
No strong emotional response, which is of course to be expected since he's only just met her. The kiss on its own bears no significance - from his understanding, it is the context of the relationship between two individuals which grants such gestures gravity. And since the matter is tended to, he can go right back to pursuing his curiosity. ]
If you do not mind my inquiring - you stated that you are not human?