Little Johnny and his father were walking in the park.
They saw two dogs having make love.
Little Johnny asks, “What are they doing, dad?”
Dad replies, “They’re making puppies.”
Later that evening little Johnny walks into his parents bedroom and they are having lovemaking.
He asks, “What are you doing?”
Dad replies, “We’re making a baby.”
Little Johnny replies, “Well, can you turn her over? I want puppies.”