Doll Secretary

A man comes home with his daughter, whom he has just taken to work for the day.
The little girl asks, "I saw you in your office with your secretary. Why do you call her a doll." Feeling his wife's gaze upon him, the man explains, "Well, honey, my secretary is a very hard-working girl. She types like you wouldn't believe, she knows the computer system, and is very efficient."
The daughter thinks for a minute and then replies, "Oh. I thought it was because she closed her eyes when you lay her down."