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A doctor is making a routine call to one of his elderly patients. He asks:

- And how are you doing today, Mr. Johnson?

Mr. Johnson replies:

- I feel just fine, doc. But you know, it's the strangest thing. Every night when I get up to pee, the bathroom light goes on for me automatically when I open the door.

The doctor is worried that the old guy is getting senile, so he phones the man's son, and the son's wife answers.

The doctor tells her:

- Mrs. Johnson, I'm a little concerned about your father-in-law. It seems that when he gets up to urinate at night and opens the bathroom door, the light somehow goes on...

Mrs. Johnson yells:

- Steven! Daddy's peeing in the refrigerator again!