I think freckles are super cute. I don't have any on my face, but I have a perfect semi circle of them on my arm! Do you have any freckles, and do you know what causes them?
I have very faint ones on my nose. They are actually clusters of melaninized skin. 
Oh that's interesting! Is there any reason why some people have lots, and others have none?
Just that people who have a fair complexion will have more. You get them also from being exposed to UV rays.
That makes sense, considering they're melaninized skin! Also explains why people who have them get more during summer.
That's why it's important to use sunscreen when being out in the sun. It reflects the sun's ultraviolet radiation.
Indeed! It's good to get some that covers UVA and UVB. I believe one causes aging, whereas the other is a cause of cancer, but can never remember which is which
I'm not sure but The American Cancer Society recommends sunscreen because it can prevent squamous cell carcinomas.