…the band was sanctioned by police after performing naked at an open-air concert in Varaždin. The band's defence that they had not been naked because they had corks in their anuses did not convince the judge
A cork is like the last thing you want up your anus except for a sharp fingernail, surely? It’s a pretty rough thing to push into your anus with its rough, dry, lube-resistingly porous surface finish.
Some info about Let 3, the Croatian entry: