A mother took her teenage daughter to the doctor. The girl was gaining weight and was sick most mornings. After he examined her he told the mother, "Your daughter is pregnant." The mother said, "that's impossible. Her father and I are very careful to see that she is never alone with a man." She said to the girl, "isn't that right honey? You are still a virgin aren't you? " The girl replied, "that's right, Mom. I have never been with a man, I have no interest in sex and know very little about it."
The doctor went to the window, opened the blinds, and stared intently outside.
After a few minutes the mother said, "what are you looking at doctor? is there something wrong out there?"
The doctor replied,"well, the last time this happened a bright star appeared, there was a choir singing in the sky and 3 guys on camels arrived from the east. I'm damned if I'm going to miss seeing that!"