In the backwoods of Tennessee, the man's wife went into labor in the middle of the night and the doctor was called out to assist in the delivery.

Since there was no electricity, the doctor handed the father-to-be a lantern and said, "Here, you hold this high so I can see what I'm doing." Soon, a baby boy was brought into the world. 

"Whoa there," said the doctor, "Don't be in a rush to put the lantern down ... I think there's yet another one to come." Sure enough, within minutes he had delivered a baby girl. 

"No, no, don't be in a great hurry to be putting down that lantern. It seems there's yet another one in there!" cried the doctor.

The backwoods man scratched his head in bewilderment and asked the doctor, "Do you think it's the light what's attractin' 'em?"