Tony can't help it, when Steve says he can be a perfect gentleman, he smirks slightly. He's not trying to diminish what he's saying, it just... Well. Isn't true. But he doesn't argue against it right away, mainly because Steve is already pulling him in for a kiss, and suddenly they're moving. Steve is moving them closer to the bed, and... Yeah, he's definitely not a gentleman because his thoughts are not exactly pure or innocent by any means right about now. If anything, he's finding himself momentarily regretting not urging Steve to do something other than kissing.

But, no. That's just his body reacting, urges that are sometimes stronger than himself wanting to take over. And he can't help it - his boyfriend is gorgeous, in every damn sense of the word. How can he not want to? But he hadn't been lying, in that it's important to him that Steve knows that he'd never rush him. Because, really, he wouldn't. No matter how much he may want to right now, he still wouldn't.

That is why, as they kiss, he just lets Steve dictate the pace. He's trying to let him take the lead. Not only because he wants Steve to be the one to decide, but because there's a moment where he really doesn't trust himself to do so.