And your point about the coffee? No laws against hot coffee either & that lawsuit caused McDees to post hot coffee warnings so they wouldn't be sued again. :/

Just because there are no laws doesn't mean someone won't take the issue to court, that's how most laws come into being anyway. 

Other 3D sites such as Daz & Rendo cover their butts (so to speak) with the nudity issue to prevent possible lawsuits. Daz allows no nudity in their store & gallery, Rendo has filters, thumb requirements, & child/child-like appearance nudity is forbidden.