Arnold Schwarzenegger has a big one.
Michael J. Fox has a small one.
Madonna doesn't have one.
The Pope has one but doesn't use it.
Clinton uses his all the time.
Bush is one.
Mickey Mouse has an unusual one.
Liberace never used his on women.
Jerry Sienfeld is very, very proud of his.
Cher claims that she took 3.
What is it?
The answer is: "A Last Name..."
You didn't really think it could be something else, did you? ;p