You're not human. I assue we're not physiologically identical.
[ Might be trying to convince himself that he would feel something if Tyki did plant a bug in him, as it were. He's definitely doing a good job at feeding Reid's paranoia and depending on how the rest of this day goes... who knows.
If he could back up anymore than he already has, he would. Instead he struggles against the gentle coaxing with little success — he knows what they need to do in order to escape. He just doesn't like it at all. ]