Know everything? No, he would never say he knew everything. There was always room for improvement, always more to learn. And that went for every walk of life, not just the sack. That didn't mean he couldn't be surprised though.

The shout that was torn from his throat echoed through the room. He knew exactly what Tony was done but damn he'd never realised it felt like that. Gladio thought he'd saw stars at one point. Maybe blacked out for a half second. But a moment later he was gripping Tony's hips harder, nails again digging into flesh. He shifted his own hips, bucking with a deep, guttural moan as his aching cock rubbed against Tony's stomach. The friction along with Tony slamming deep into him had on the edge. He called out Tony's name, all the warning he could give before a perfectly aimed thrust had him crying out. Gladio came hard, making a mess of both his own and Tony's chest. He clenched, clamping down around Tony and panting as he rode out the waves of pleasure.