A little boy and his dad were walking down the street whan they saw two dogs having sex. The little boy asks his father: "Daddy, what are they doing?" The father says: "They are Making a puppy". So they walk on and go home.
A few days later, the little boy walks in on his parents having sex. The little boy says: "Daddy, what are you doing?" The father replies: "Making a baby". The little boy says: "Well, flip her around! I'd rather have a puppy instead!"