A child asked his father, “How were people born?”
So his father said, “Adam and Eve made babies, then their babies became adults and made babies, and so on. “
The child then went to his mother, asked her the same question and she told him, “We were monkeys then we evolved to become like we are now. “
The child ran back to his father and said, “You lied to me!”
His father replied, “No, your mom was talking about her side of the family. “
This joke is included in the Black Book of Jokes. You can order it from here.