Little Johnny was walking his dad

Little Johnny was walking around the block with his Dad one evening, when they came across two dogs  up.

Johnny, “Dad, what are them two dogs up to?”

Dad, “Well, Johnny, they’re..uh..well..uh..they’re..well that’s how they make puppies.”

Little more was said about it, and they made their way home.

Later that night Johnny woke up thirsty, and made his way to his parents room to ask for a drink of water.

There he found his parents in the middle of their love making. Johnny, “Dad, what are you doing to my Mom?”

Dad, “Well..um..er..well..we’re making you a baby brother.” Johnny, “Roll her over. I’d rather have a puppy.”