He feels the gentle pressure of her hand through his shirt as it sends electric shocks through his middle. For that second he completely forgets about the reactor and presses closer, fastening his arm around her waist and cupping her lower back in support. It would feel juvenile, probably, if he had had normal experiences like this in his youth and he does feel a strange tug like he's doing something wrong, but it doesn't feel bad. It's exciting if anything, and Tony strokes his tongue against hers, grateful that he's finally able to turn off his brain and enjoy the moment for what it is.