We spend a lot of time trying to decide what's porn and what isn't around here, so it can be a relief to go to a museum, where we can be reasonably assured that any naked body parts are art, not porn. But a couple of recent news stories seem to be blurring the line between the two.

First there is the team of husband-and-wife artisans who are fighting to preserve the centuries-old Portuguese handicraft of penis ceramics. Francisco and Casilda Figueiredo have spent the past 30 years lovingly shaping and molding the ceramic penis mugs, penis-shaped bottles and ceramic soccer figures with the male member popping out from under a flag. The tradition is said to have started in 1861 B.J.J. (before Jenna Jameson).

Then there's the Bay Area shopkeeper who was asked by police to cover the engorged member of a Balinese statue he keeps in his shop's window. The fuzz say the wooden statue is pornographic; Robert Hedric, the Castro merchant, insists it is art.

So how do you tell dirty nudity from the fancy kind? Seriously, we need to know, so we can decide whether or not we should feel guilty about ogling Aphrodite's hot rack in "The Birth of Venus."