If he'd loved the sound of Caduceus' moans, that whine twisted right through him and settled in the deep, desperate place burning inside him too. It had been so long and no one had ever responded to him like this. Not ever. He didn't even think it was possible for him to make another person feel this way - or to feel this way himself. He thought that possibility had been ripped from him, and now it was laid out in front of him in the most absolutely literal sense. All he had to do was take it.
He had to stretch to reach and still keep his hand where it was, but he leaned up over Caduceus and pressed their lips together - a bit too soft and sweet for what they were doing, and entirely too swift. But he wanted it. And he wanted it before he shifted and couldn't reach his lips any longer. The permission was all he needed to move, though, and the enthusiasm with which it was given hurried those movements. He tried to stay close so he wouldn't lose the feeling of the grip on his hair, but it took a bit of navigating to get into place. He ended up astride Caduceus' thighs, still leaning over him, and slowly withdrew his fingers.
He hated losing that tight heat, but it would be worth it in a moment. And his fingers were slick enough that he could reach down again and run his hand over his own cock. If he'd had any idea that things might have been heading in this direction he might have put something useful in the basket. But he was as swept away by this as Caduceus was and he could only hope that this would be enough. He moved slowly though, gently, easing in and paying close attention for any resistance or discomfort. He wanted so badly to sink straight in, and need to take his time dragged a ragged moan out of him. Everything was dizzyingly perfect, though, and he didn't want to ruin it by taking too much too fast.
Little by little, Caleb pressed down into him, sliding against Caduceus' cock until he felt him stretch and almost pull him further in. He dug his fingers into the cushions, shaking a little with the effort it took to keep himself steady, his head dipped forward and his eyes focused in on the sight. He wasn't aware of how hard he was breathing, or the little beads of sweat that had started to form between his shoulders, at least not until he came to rest completely enveloped inside Caduceus.
Caleb swore, the Zemnian unusually harsh even for him, and held himself there for just a moment as Caduceus' body got used to the unfamiliar intrusion. Then started to shallowly move.