system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are genitals/buttholes darker than the rest of your body typically?
gpt
The same hormones that cause that area to develop during puberty also cause the skin to overproduce melanin (dark pigment). It's leftover evolution from when people didn't wear clothes and getting sunburned down there wouldn't feel great.