[Sebastian withdraws his hand. All done, see? A servant doesn't touch his master without reason.]
Reactions. [His smile widens, the possessive glint in his eyes gone.]
A simple butler cannot possibly hope to understand the way that the entity controlling this world thinks, but I would hazard a guess that reactions of the sort the young master describes are exactly what it seeks to elicit.
[Of course someone like Sebastian couldn't possibly understand that kind of thinking.]