Every country tells jokes about other countries. I thought I'd tell an Irish Joke on a visit to Ireland. They came back with a riddle: "What's black and blue

Every country tells jokes about other countries. I thought I'd tell an Irish Joke on a visit to Ireland. They came back with a riddle: "What's black and blue and floats in the Liffy?" "I don't know. What?" "Australians that tell Irish Jokes!"