An 8 year old girl asks her grandfather, "Grandpa, what's couple sex?". Surprised his granddaughter would ask, but deciding if she is old enough to ask, she's old enough to hear the truth.  So, bracing himself, he explains about the birds and the bees.  Telling about the pleasures and responsibilities of sexual intercourse.  When he's finished, he sees such a shocked look on his granddaughter's face, he asks her, "Sweetheart, why did you ask me this question?".  She replies, "Grandma said dinner will be ready in a couple secs."