Mr. Jones and Mr. Brown work in the same office. One day Mr. Jones says to Mr. Brown, "I will have a small party at our house on Monday evening. Would you and your wife like to come?" Mr. Brown says," Thank you very much. I'd love to, but let me ask my wife first." So Mr. Brown goes to the other room and telephones his wife. Then he comes back and looks very worried. "What's the matter?" asks Mr. Jones, |Is your wife at home?" "No," answers Mr. Brown, "She isn't at home. My small son answers the telephone. I said to him, 'Is your mother at home, David?' 'She is somewhere outside.' he answered. 'What's she doing?' I asked, 'She is looking for me.' he answered.