The werewolves in my setting have a problem. Letting humanity at large know that either they or any other sort of magical creature actually exists is illegal, and so they have to pretend to be human. For the most part, this is pretty easy for them to manage. They can control their transformations basically at will (the only limitations are on when they can use their wolf form, not their human form), and aside from being naturally more fit than the average human, they look identical to one.
...With one exception.
A werewolf's androgenic hair (that being beard and body hair) has far more in common with the fur of a wolf than the body hair of a human. It grows in the same places, and at the same speed, as on a human, but it's definitely not human hair. So in order to pass as a human, werewolves can't have beards (or any other body hair a human is likely to see), and need to shave regularly before it gets too long.
The question I have is... how long?
If someone were trying to conceal the fact that their beard and body hair is actually wolf fur, how long could it get before it became clear, whether by sight or touch, that this stubble isn't natural?