Stacy, I seriously think the fair way to go is to make all thumbnails Blank, and only have a short descriptive, Nude/Non-Nude. Or if the artist is ambicious a short narrative of the subjet matter. See no one is excluded and everyone is treated EQUALLY!
A_

Is there water in your future or is it being shipped away to be resold to you?
Water, the ultimate weapon...
www.futurefantasydesign.com