Prometheus purred at Hades's rubbing his feeler, feeling that prickling, electrified feeling curl down his spine with each tight circle of Hades's thumb. It was arousal, he identified belatedly, a sort of, lazy, muted sort that would've had his toes curling if he was still an Amaurotine. As it was, his tail just flicked out of the water, his purr rumbling through his chest like a combustion engine.

"Belly rub? Mmm, that sound tempting..." Prometheus murmured. Hades's touch felt nice, even if still a little overwhelming - to go from no touch for over a thousand years to suddenly all this touching - and imagining those familiar, warm hands stroking down the sleek scales of his belly had him feeling curiously hot behind the sternum.

So, with a bit of a wriggle, he managed to roll over without too much splashing, inhaling enough air to 'store' in his lungs to keep him buoyant with his belly now facing upright. The scales were a little paler - more sooty grey than jet black - with some speckles of dark purple here and there. Between his hindlegs were a bump, a protective sheath if one looked close enough, with a closed slit just behind it.