Everything recognizable from the Harry Potter universe belongs to J.K. Rowling, no infringement is intended to any copyright holder.
"Hold still Remus!"
Cold! Makes my toes tingle! Lupin mind-spoke to his oldest friend, his snout scrunching up to emphasise his discomfort.
"I know, but I got the quick drying formula," Black blew gently over Lupin's furry toes, causing the wolf to shiver. "See, you can't even feel it anymore can you?"
No. The werewolf's tone was pouty. He flicked an ear in mock annoyance.
"Oh hush, you can do me next; I'll even let you pick the color, how's that?" A rakish grin softened the animagus' Azkaban-worn features and set his pale eyes alight.
Fine. Remus murmured. Padfoot had had so few pleasures in his life for so very long that Lupin didn't have the heart to put up any fight. And it wasn't as if he weren't enjoying himself as well.
"Wonderful!" Sirius once again bent to his task.
Remus forced himself to remain still and accept the cool brush and the gentle tickle of his friend's breath. Focusing on the other man's movements he was able to fully relax and enjoy Sirius' obvious pleasure.
"All done, Moony!" Black finally announced as he straightened up. His grin was firmly in place but there was just the tiniest spark of vulnerability in his grey eyes. Lupin felt a small pang somewhere in the vicinity of his fluttering heart.
Making a great show of things, Moony raised one foot then the other, alternately wriggling his toes and inspecting them with and intensely speculative look causing his muzzle to wrinkle up. He had to agree, the Gryffindor red tipped with gold really did look nice against his sandy-brown fur.
Pulling his lips back in what most would consider a vicious snarl, Remus grinned at his friend, I like it! I think, for you, the black lacquer with silver glitter. But first, do my paws. He held out his arms, finger-like digits outstretched imperiously and Sirius gave a delighted laugh.
"Alright, then me. Afterward, we'll braid each other's fur!"
