Madara awoke already purring, shivering a little under Tobirama's hands, but otherwise didn't move. Except for his hair, twisting and curling lovingly around Tobirama's wrists, bright crimson eyes heavy-lidded but still watching him and fanged mouths curled into lazy smiles.

Tobirama tugged, gently-rough, at one particularly languid lock, and the entire mass squirmed as Madara let out a long, low moan, all but melting into the bed.

(I had just begun an AU where Madara's hair is an eldritch horror on January 1st, shortly before I saw this prompt. I had to write a bit of it to drop here. XD)