Musk is a kind of fragrance originated from animals. It is a soft and fluffy smell of animals. Roux describes musk as "soft as powder".
Most of this adjective will be used to describe wood based perfume, imagine the smell of pencil sharpening with a blade, and a sharp wood smell from the sharp blade against the hard wood. On the contrary, like sandalwood and cypress, they smell like being in the forest, and we will classify them as wet.