A census-taker in Missouri went up to a trailer home and knocked on the door. When a woman answered, he asked her the names and ages of her children. She said: "Let's see now, there are the twins, Billy and Bobby, they're fifteen. And the twins, Seth and Beth, they're fourteen. And the twins, Benny and Jenny, they're thirteen." "Wait a minute!" said the census-taker. "Did you get twins every time?" "Heck no," answered the woman. "There were hundreds of times we didn't get nothin'." Did you hear …