system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 Do animals tan?

OK, I know this sounds silly but I’m a ginger so when I tan I tan really hard on the top side but not at all on the bottom. It makes me think of the way that cheetahs and leopards are darker on the top then they are on the bottom. Do animals tan? Does fur make it so that they don’t tan?
gpt
Animals can get sunburned like we do, pigs for example root in mud to cool off and because mud is a form of sun protection. Animals with fur cannot get sunburned where and when the fur covers them but can get burned on their lips and eyelids.