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 really have the smallest head in the world.

The third guy comes back and angrily says WHO THE FUCK IS JUSTIN BIEBER!?