Caleb was surprised at how vocal Caduceus was, it wasn't something he had expected from him at all. And he was equally as surprised at how much he enjoyed it. He was so used to needing to be quiet when he was at the Academy and he hadn't really done much since then. But no one could hear anything outside of the Tower so there was no need for that here. Every sound brought another rush of heat through him and spurred him on, making him more and more confident of his movements.
He was amazed at how good it felt and how amazing it looked. He was trying to concentrate on what was going on right in front of him, but his mind kept wandering off to all the other things he wanted to do to and with Caduceus; how good it would all feel. There was a little spark inside of him, too, that responded so strongly and so instantly every time Caduceus asked him to do something. He knew exactly where that came from, but it didn't matter, because even that lit him up.
He dipped down again, sliding his finger out just enough that he could try to slide a second on in next to it, then wrapped his lips around Caduceus' cock again. He would have still liked to feel it slowly filling his mouth but, he thought, next time. He wasn't sure what his objective was here, but he had gotten started and he had no intention of stopping - largely because Caduceus had just told him not to, but also because it entirely too good to bring to a halt. It didn't matter that he was almost painfully hard and had made no attempt to reach back and relieve some of that tension himself. That could wait. The most important thing to him was seeing if he could get Caduceus off, and knowing what he looked like when it happened.