A soft press of lips, chaste and nervous. Steve pulled back, eyes wide and cautious. His cheeks were stained with blush.

"I'm…I'm sorry." He stammered, "I shouldn't have done that."

Tony looked up at him, stunned for a moment. Steve had kissed him. Him! Why he'd done that Tony didn't know, but he wasn't about to let a good thing get away from him. He stood up on his toes – Steve was unfairly tall – and kissed Steve gently on the mouth. For the briefest of seconds, Steve froze, and Tony wondered if he'd made a mistake. But then Steve kissed back, shy and sweet and warm, and Tony knew he'd been right all along.