Tony arches an eyebrow back at Steve as he leans one elbow on the railing. His smile is a little warmer than usual, though he'd never admit to feeling any sort of affection for anyone. 

Desire?  Yes. Respect, even?  Sure. But affection?  For Steve Rogers. 

"Are you in your right head now?"

He doesn't need this to end in sex. He was having a pretty good time making out.