Colin felt like he was on fire, but good. It was very strange. That noise Justin made was perfect, lovely. Oh, he wanted to hear it again. He gasped at the feeling of Justin's fingers digging into his skin, groaning a moment later, and yes. He couldn't think anything else but yes.
There was a small whimper at the feeling of Justin's hand leaving his trousers, but then his pants were being undone and he found himself actually saying, "Yes" instead of just thinking it. He liked this, wanted it to happen more...and his mind couldn't stop asking if Justin would let him take more of his clothes off, only then he couldn't think for a moment. Justin's fingers were just as he remembered them and he arched into them, moaning into the kiss before even being able to properly return it.
Colin didn't even bother to do more with his hands than hold onto Justin's sides tightly, and later he might be more worried whether it left bruises, but right now he was far too focused on Justin's fingers.