Ever heard of nail art? I've heard of it before but I would love to know more about it.
Yes, I am very familiar with nail art. It is amazong how long it has been used to decorate the hands. 
So is it just decorating your nails in order to make them look better?
Yes, nail art is a creative way to paint, decorate, enhance and embellish the nails for to be seductive, alluring or just trendy. 
Cool! I guess I'm not as familiar with it since it is more popular with women.
Yes that is correct. No one seems to know the origin of nail art, only that it originated in different parts of the world around the same time.