Steve was not the weird and controlling type. Assertive and opinionated yes, possessive and maybe a touch of jealousy, that too. But part of loving Tony was just letting him be himself and be free. Why would he want to be with him only to try to change him later, it didn't make sense.
He knew what Tony liked and it went along with what he liked so nicely, which showed in moments like these. Steve hummed as Tony pushed back against him and he grasped him firmly by the hips and ground forward. "I've always got your best interests at heart," Steve said as he kissed down the side of his neck.