A little boy is with his father and sees two dogs ****ing. The little boy asks, "Daddy, what are those two dogs doing?"
The father replies, "Well son they are making a puppy."
That night the boy walks into his parents bedroom and sees his parents having sex. "Daddy, what are you and mommy doing?" the boy asks.
"We are making you a baby brother," the father replies. "Well turn her over," the boy says, "I'd rather have a puppy."