3 Guys are in a cafe.
The first guy says "I have the smallest arm in the world.
The second guy says I have the smallest head in the world
The third guy says I have the smallest dick in the world.
They all go to the Guinness Book of World records.
The first guy comes back and says I really have the smallest arm in the world.
The seconds guy returns and says I have the smallest head in the world.
The third guy comes back and angrily says WHO THE FUCK IS JUSTIN BEIBER
