system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do hairs grow longer/darker out of moles or freckles?
gpt
A mole is basically a benigh growth of pigmented skin cells aka melanocytes. Scientifically known as a melanocytic neavus. So any hair that outcrops from these regions are darker, thicker and coarse due to the increased presence of melanin.