Jack pulled back a little, resting his forehead against the Master's, sliding his hands down onto the Master's shoulders, thumbs brushing against the pulse-points on either side of his neck. Just the physical contact, the nearness, was enough for him right now.
The fact that he'd done more than he'd have the chance to do with - to - his Master was skittering at the edge of his mind, threatening to push him off-balance if he let himself think about it. So he didn't. Just. Shoved it away, and focused on his breathing, on the cool skin and double-pulse under his fingers, the simple presence of the Master. Here. Now.