[quote=Lalliman]
Because don't fairies have genitals? Though i suppose the nudity norm is different when you're four (and a half) inch tall. 
[/quote]

She's hardly the image of sexual maturity, by human standards. Also, as you astutely noticed, she is only four (and a half!) inches tall. It might qualify as nudity to a dictionary, but the unlikely pervert looking for a nice shot of fairy bum would probably need to look rather closely to get a good view. And that's assuming they can catch her and hold her still long enough to actually see anything.