system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why do black people have lighter skin on the inside of their hands?

I'm not trying to be racist...I am black.  I am actually just curious.
gpt
Everyone does, not just Black people...

The reason is because the palms of our hands and the soles of our feet contain very little melanin due to receiving far less ultraviolet rays than the outer regions. And when our palms and soles do receive ultraviolet rays, they don't allow the rays to pass through as easily.