I'm going out on a mythological limb here...

Not that I'm taking either side, but adding perspective.

The particular fae we have in question, the fairy, is more commonly known as a pixie or will o' wisp.

Which is quite different from the actual fae, referred to as Sidhe,  in movies and other fantasy fair.

The pixie/brownie/wisp is an embodiment of nature, pure and simple.  As such, civilized conveniences such as clothing are a contradiction to their nature.  If covered by anything, it would be by something made from leaves and twig.  Take the popular Lady Cottington's fairy fashion book for example.

However, just the same, it is just as likely and probably for this kind of fae to be nude.  Simply because that, is as natural as you can be. 

Which brings us the argument of whether or not nudity in itself is obsene/pornographic.   And then it starts all over again.  So.  Ya. 

Just  a handful of my thoughts on the global issue.