Rafa's mouth was full, and rather than pause what he was doing, answered Lukas's praise with a throaty, "Mhmm..." It always amused him just how surprised Lukas was each and every time, even after all the times they'd done this.
It was kind of adorable. Humans were so weird!
In any case, Lukas was far too coherent right now! Rafa aimed to fix that, to pleasure him until he was no longer capable of complete sentences, and he redoubled his efforts. He swirled his tongue around the head and sucked gently on it, then dipped his head down and dragged his teeth lightly along his shaft as he took him in as far as he could go, again and again, pausing every now and then to pop him out of his mouth so he could lick teasingly along his length and nibble him with his lips. What his mouth didn't cover, his hand stroked as he worked, moving in time to the efforts of his mouth, and his other hand was far from idle.
He ran his nails over Lukas's inner thigh and then slipped down between his legs to caress his balls, gently massaging them to enhance his pleasure--and moaning in pleasure of his own, and not just because Lukas was gripping his hair. He loved this, loved the taste of him, loved listening to Lukas's moans, loved hearing the change in breathing, loved feeling his little twitches and squirms, all the little things that told him he was doing a good job. His tail swayed behind him like a contented cat and he lifted his eyes so he could watch Lukas's face.
There were few things better to Rafa than bringing pleasure to the one he adored--and he certainly adored Lukas.