Joke so clean you can tell your Mother...

Saint Peter is checking in people at the Pearly Gates. When Albert Einstein approaches St. Peter says, "How are you going to prove you're really Albert Einstein?"

So the famous theoretician asks for some chalk and a blackboard and proceeds to jot down complicated mathematical formulae about the speed of light.

St. Peter says, "Wow, I guess you really are Einstein! Go on in."

A little latter Pablo Picasso approaches and St. Peter says, "How are you going to prove you're really Pablo Picasso?"

So the famous artist asks for some charcoal and an artpad and proceeds to sketch out a woman's face with the both eyes to one side of the nose.

St. Peter says, "Wow, I guess you really are Picasso! Go on in."

When George Bush finally shows up, St. Peter says, "How are you going to prove you're really George Bush after what I just put Eintstein and Picasso through?"

And Bush asks, "Uh, who are Eintstein and Picasso?"

St. Peter says, "Wow, I guess you really are Bush! Go on in..."