system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is pubic hair generally more coarse and curly than the hair on your head?
gpt
We evolved to keep our pubic hair even after we lost most other body hair because it provides more surface area for pheromones to disperse into the air. So, it makes sense that the hair would be curly and coarse--more surface area in a smaller area.