The Master hadn't felt this in tune, emotions and body together, in a while either. His instinct, being who and what he was, was to press into Jack's mind and share, to bring that part of himself into synergy as well. He remembered too well having unwanted emotions dumped into him to initiate that at all without some signal from Jack, his little slip earlier aside. He fought to contain all his feelings, and keep up that hard and fast rhythm.