A boss has to interview four girls for a secretary's position. He thought of a question and asked each one of them:
Boss: "A woman normally has two mouths, What's the difference between the two?"
The first one answered: One can talk but the other can't.
Second answered: one is vertical and the other is horizontal.
Third answered: one is hairy, the other isn't.
The last one answered: One is for my use and the other is for my boss.
Boss: You're hired!