system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How is it that your facial skin is so different from the rest of your skin that products have to be made specifically for it?

(For example, hair removal lotions for your legs can't be used on your face)
gpt
Lots of products have chemicals which won't hurt your skin, but you don't want them in your eyes/nose/mouth. Your face contains those things, so they recommend that you not put the product on your face. Nair will remove leg hair without too much skin irritation. Get it in your eye, and you are gonna have a real bad day.