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 mum was talking about her side of the family.”
The father in this bit of humour makes the joke that his wife’s side of the family came from monkeys. Sometimes our references to others can border on stereotypes or even hidden racist views.