Nah, Tony wasn't small. He was only an inch shy of average height for a man and that wasn't short. Just... every superpowered dude around was living in six feet and over land. That wasn't on him. Hell, it wasn't even a thing he worried about.
If anything, he liked that Steve was taller than he was. And no, there wasn't any point in pretending about the manhandling, was there? Tony wasn't exactly subtle about how much he liked it. Neither was Steve.
He breathed out a sound of deep approval when Steve moved them both about -- wasn't all that surprised when he ended up on hands and knees -- and hell, he took it one further by leaning forward more and resting on his elbows instead of his hands. It was a sturdier position, and had the benefit of making his ass stick up a little higher, and he pushed back a little against Steve in a tease. "You know it is," he said, firm as Steve's hands. He'd always liked when Steve's tone went soft and encouraging even when his actions didn't quite meet the words.