Shades of Gray

Remus was fourteen years old when he saw it: his first gray hair. Really, he supposed, he should've expected it. With the stress of monthly transformations and trying to stay on top of his studies and keep his friends out of too much trouble, it was bound to happen sooner or later. Perhaps it was vanity, but Remus had rather hoped it would be later.

For a month or so, Remus tried everything from plucking to hair potion, but the pesky little buggers multiplied. Eventually, Remus conceded defeat and quit trying to hide the fact that at fourteen years of age, he was going gray.

That was when Sirius noticed.

He, on the other hand, wasn't averse to the grays. In his opinion, they made Remus look older, wiser, like a fine wine that gets better with age. When he bent over his books to study (or, God forbid, for pleasure) he could almost imagine Remus as a Hogwarts professor. As such, he was completely, explicitly off-limits. All his life, Sirius had inexorably wanted the things he couldn't have.