Tony doesn't smile--that would be too much, considering he's trying to relax Bruce--but the edges of his lips do twitch just slightly. He likes this. This is good. A positive response from his friend, even hesitant, is like pure gold. He's in love with the way Bruce feels out everything; the way he analyzes it with his brilliant mind and takes it all in. He makes every experience count in a way that Tony, just because of who he is, simply can't fully fathom. He's happy to get to touch the beginning of that deep understanding, even as a bystander.

"I can't give you God, but there's always time for a kiss."

He purrs the answer. He can't resist--not when Bruce's eyes close at his touch and he sounds so hungry for it. Tony lives for that sweet response, and he makes good on his promise. Lips find lips as he kisses Bruce right there on the couch, letting his hand wander over the warm muscle under his shirt.