Need a puppy?

I heard the joke like this..


Johnny is looking out the living room window when he see two dogs breeeding.

He says "Daddy, what are those dogs doing?

Dad answers "They are making puppies."

Johnny says "OK."

A couple of days later Johnny walks in on his parents making love.

Johnny asks "Daddy, what are you and mommy doing?"

Dad answers "We are making you a little brother or sister."

Johhny says "Daddy, roll mommy over I would rather have a puppy."