Like the ad says, at 300 dpi you can tell she's wearing a
swimsuit. At 600 dpi you can tell it's wet. At 1200 dpi you can tell it's
painted on. I suppose at 2400 dpi you can tell if the paint is giving her
a rash. (So says Joshua R. Poulson) 
(Courtesy of Bob Taylor <brtaylor@qtpi.lakewood.ca.us>)