3 guys walk into a bar. The first guy says, "I've got the smallest arm in the world." The second guy says, "I've got the smallest head in the world." The third guy says, "I've got the smallest dick in the world." The three thugs go to Guinness World Records. The first guy comes back and says, "I really do have the smallest arm in the world." The second guy comes back and says, "Amazing, I do have the smallest head in the world." The third guy comes back angry, "Who the fuck is Justin Beiber?"