An 8-year-old girl went to her grandfather, who was working in the yard and asked him, "Grampa, what is couple sex?"
The grandfather was shocked that she would ask such a question, but decided that if she's old enough to know to ask the question, then she's old enough to get a straight answer.
Carefully and gently he began to explain, leaving nothing out, telling her all about human reproduction and the joys and responsibilities of sex. When he finished explaining, the little girl was looking at him with her mouth hanging open, eyes wide in amazement.
Seeing the look on her face, the grandfather asked her, "Why did you ask me this question, honey?"
The little girl replied, "Grandma says that dinner will be ready in just a couple secs.