A boy is writing a paper on childbirth and asks his parents

A boy is writing a paper on childbirth and asks his parents: "How was I born?"

His mother awkwardly answers: "The stork brought you."

"Oh," says the boy. "Well, how were you and Daddy born?"

"Oh, the stork brought us, too, and Grandpa and Grandma."

The boy begins his paper: "This report has been very difficult to write due to the fact that there hasn't been a natural childbirth in my family for three generations."