Tony is very good at deflecting, always has been. Give him an inch and he'll talk circles around anything. Even when he's being completely honest, there's almost always still something he can't help but hold back, some level of snark and affected disinterest that keeps him just a little distant from everything. It gets him in trouble more often than not, but it's a very old defense mechanism.

And for all that, it's very hard to maintain that distance in the face of one gentle kiss. Tony thinks he might understand a little why Steve was so uncertain about this one thing in face of everything they've been talking about. If Steve had gone in for deep, dramatic liplock like Tony half expected, that would have been simple. Sex is easy, everyone just looks for a good time and that's the end of it. This is...not that. There's an emotion here that Tony's having a hard time placing, and isn't sure he wants to yet.

It's light and it's almost sweet, and Tony lets out one soft exhale and leans into it. Maybe he's just caught up in the moment, but he doesn't try to push for more, doesn't try to make it anything dirtier. Just lets it be what it is.