Show some skin
All mammals have hair — it is one of their defining biological characteristics — but there are a few bizarre species with hair so reduced by evolution that they actually appear to be naked.
Perhaps it's because of the essential nature of this mammalian trait that we find bare skin such a strange and comical thing on a mammal. Before poking fun at these adorable little nudies, however, don't forget to look in the mirror. We humans are among them.