There was absolutely no hesitation at all in Caleb. His curiosity was far too strong for that. And there was no reason at all for Caduceus to be self-conscious about the difference between them; if anything, those were the things that drew Caleb in the most. He wanted to know what Caduceus felt like, looked like, tasted like. The sudden swell of desire that swept over him just made him feel overwhelmed and dizzy all over again.
He nuzzled back into Caduceus, dipping his head down to tuck in against his neck and breathe him in. He could watch, a little bit, from this position as Caduceus' hand slipped down over his stomach. His breath hitched, his body reactively arched towards the touch, and he breathed a sharp huff of an exhale as fingers finally wrapped around him. It took a second for his brain to catch up with his body, but before long his own hand slid forward and traced the line of Caduceus' hip, down along his thigh, and then slowly between his legs palm him. He could feel heat there, and the distinct shape of him just out of sight, but he kept his palm covering the bulk of him while his fingers worked slowly and carefully in an attempt to tease him forward.
"Everything's good," Caleb said, chuckling softly - the sound a bit more breathy and needy than he'd intended. And while he didn't want to lose the touch, there was so much more that he wanted. The only problem was that so many of those things were in conflict with each other. He wanted to keep touching, to kiss him, to slide down his body and put his mouth to better use elsewhere. He wanted to wrap himself up in Caduceus. Caleb wasn't great at self-control.
In the end, he had to choose one, or else he'd just lie there and do nothing at all. Which, he supposed, was an option too. But he pressed his lips to Caduceus' throat, then his collarbone, and on down his chest as he shifted up onto his knees and nudged Caduceus down. "Stop me, if you need to..." he said, glancing up for just a moment before continuing his way on down the center of his chest and stomach. He kept his hand where it was, still rubbing softly, even when his lips found their way there. He dropped over towards Caduceus' hip for a moment, to give him time to tell him to stop if he wanted, then slowly dragged his tongue up over the bulge.