Caleb wasn't the most intuitive person - at least not in the way that Caduceus was - but even he could sense the slow rise in tension and he slowed down a bit in response. He still kept his hands and lips on Caduceus' body, but he moved a bit lighter and softer just so they could both get used to these new feelings. He had no idea what kind of experience Caduceus had, but given that he'd been living alone in the Grove for most of his life, Caleb figured it wasn't much. And that wasn't much less than what Caleb himself had. There had been a few teenage dalliances and he had fallen into bed with Astrid and Wulf a couple of times after a long night of drinking and dancing. But so many of those memories were gone now. It was almost as if it hadn't happened at all.
Still, he knew what he liked. And he could walk Caduceus through those things. He just needed to slow down and be more aware of both of them. He could tell that Caduceus was curious about his body and maybe he should have given him more of a chance to explore that, but he didn't want to miss this opportunity either. They could come back to it.
His thumb traced the slit, carefully working it a little further open, his tongue following swiftly after. He didn't press inside, he didn't know if that feeling would be good or bad, so he stayed right on the surface gathering the slickness on his thumb and tongue. He caught the tip between his lips and slowly swiped his tongue across it, the parted his lips wider so he could seek out more. The hand in his hair send a charge of arousal through his body and Caleb moaned, the sound rumbling around Caduceus' cock. But he did his best to keep his gaze angled upwards, to make sure he wasn't doing too much or that it wasn't uncomfortable. And if Caduceus wanted him to stop at any time, all he had to do was tug him away. Until then, Caleb just wanted to feel him fill his mouth, a little bit at a time, and know that he was the one bringing him pleasure.