[Showing anyone his reactor is honestly not something he's comfortable with. So, expectedly, he's a little stiff when Justin finally gets to see it. He's not shy about anything, but right now he feels exposed. Too exposed. At least without his glasses Justin might not take in quite as much.]

Just keep your eyes up here.

[He flinches when Justin says it's beautiful. Tony raises his arm to cover it, knowing full well it isn't doing all that much, but feeling better just because he can. It's his safety net.

But he does assume that Justin won't figure it out. It's not like he can work out the design of the arc reactor just by looking at it, and even if he did, he couldn't build one. Probably. And then there's the admiration. The way that Justin looks at his work, the little disk that is his heart now, makes him feel a little spark of excitement that he knows he shouldn't feel in front of Justin Hammer. He shifts his weight, trying to turn this back into a better direction that doesn't focus on his chest.]

I told you, it's all an extension of me. The suit is just part of the equation... so now you know.

[At least he knows as much as Tony is willing to give him for the moment. It would be so much easier if Justin wasn't actually capable of figuring these things out, but Tony's plan is just to go with it, so he cups his hand around the back of Justin's head and tries to distract him with another kiss. It's deep and dirty this time, with a little edge of desperation in his impatience.

Just keep your attention up here. They were just about to do something, right? This is important.]