What he can't get over with Tony is how good he seems to want to make Bruce feel, and also the part where he's successful at it. The way he looks at him, touches him, reaches right through him and starts to turn something on deep inside. Not like that -- okay maybe a little like that -- but there's some self-acceptance, some... contentment that Tony's shaking loose. It's heady and intoxicating, and frightening because he knows he could lose himself in that so easily. With Tony so eager to give it, Bruce can only resist for so long before even his restraint will crack.

He sucks in a breath and stiffens at the hand on his skin, and now both hands clutch at Tony's shoulders, fingers flexing and seeming at the point of either pushing him away or pulling him closer. Bruce can't tell what he's trying to do here, either. He could think about it, or he could just force those little voices away and focus on kissing Tony back. Because, yes, the dirty tilt to the kiss is just what he'd wanted to add but been too hesitant to do himself. He's going to get dizzy on this, on being wanted so openly, so wonderfully, and by Tony of all people; Tony, who burns bright enough that Bruce gets a little buzz just standing next to him, most of the time.

He can't think of anything to say, nothing in response to the words murmured against his mouth, so instead he makes a small sound -- of assent, surprise, arousal, warning, a combination of all the above. Tentatively, he drags a hand down Tony's chest and then under his shirt, fingers gently exploring, touching, what Tony already offered to him before. His heart rate is climbing, but that's less of a trigger, more of a gauge for danger by this point. It really comes down to whether or not he can keep hold of his rational mind.