Weird Names_英语笑话

one day a little boy asked his father, "how come you named my sister running dear?"
so the father answerd his question and said, "when your sister was born i couldn't think of a name so i looked out the window and that was the first thing that i saw."
"oh" said the little boy, "is that the same reason why you named my brother flying bird?"
the father said to his son "why do you ask that two dogs fucking?"