Well this guy has a pair of undershorts tattooed on his body so technically he isn’t naked.
If you’re ever in Barcelona, you might get “lucky” and run into “the old naked guy“. No one knows his name but everybody knows him, he’s kind of a local mascot, walking around in the nude with his huge penis hanging down halfway to his knees. Tourists either avoid him or just stop and stare at him, but he doesn’t seem to mind. The police have tried to reason with him and he has even been institutionalized a few times but he always came back.