Johnny was assigned a paper on childbirth

Little Johnny was assigned a paper on childbirth and asked his parents,

“How was I born?”

‘Well honey…’ said the slightly prudish parent,

“An Angel brought you to us.”

“Oh,” said the Little Johnny.

“Well, how did you and daddy get born?” he asked.

“Oh, the angel brought us too.”

“Well how were grandpa and grandma born?” he persisted.

“Well darling, the angel brought them too!” said the parent.

Several days later, the Little Johnny handed in his paper to the teacher who read with confusion the opening sentence:

“This report has been very difficult to write because there hasn’t been a natural childbirth in my family for three generations.”