Once upon a time, a pasture full of cattle was hit by a tornado. Most of
  the cattle were knocked over. After this happened several times, one of
  them started to notice a pattern.
  
"Yo, Bessie!"
  
"Yeah, Bossie?"
  
  "When we get a tornado, do you always get knocked 
  down?"
  
"Yeah. You too?"
  
  "Yeah. And ol' Ferdinand over there, he gets knocked down too, 
  right?"
  
  "Yeah! And my daughter Bootsie gets knocked down, but my little son 
  Frankie doesn't. He stumbles a bit, but always stays up. I wonder why that
  is..."
  
"That's what I've been thinking about."
  
  So they ate some hay, thought about it a bit, ate some more hay, got 
  milked, ate some more hay, took a nap, ate some more hay, kept ol' 
  Ferdinand happy, ate some more hay, made the bettors on squares E6 and H7
  happy (albeit in quite a different way from Ferdinand), ate some more hay,
  and went to sleep for the night.
  
  During the night, Bossie had a dream, of two sailing ships. One was a 
  large schooner, the other a tiny little fishing boat. A storm came up 
  suddenly. Waves broke over the sides of both ships. The crews hurriedly 
  pulled down the sails. The fishing boat just hauled down its two little 
  sails, and waited out the storm. But the schooner was in trouble. Its men
  kept slipping in the rigging, the wet sails would stick together, and 
  finally, the wind caught the sails and just pushed the larger ship
  right over.
  
  The next morning, Bessie and Bossie were talking about their dreams. 
  Bessie pointed out that Bossie's was the solution to the mystery of why
  only small male cattle can remain standing during a tornado. "You 
  see," said Bessie, "it's mainly a matter of catching the wind. 
  You and I and Ferdinand are big, so the wind pushes us a lot, and over we
  go. But little Frankie doesn't have much area for the wind to push on, so
  he's a lot steadier."
  
  "Hmmmm. Well, that makes sense," replied Bossie, "but that
  still doesn't explain why Bootsie doesn't get knocked over!"
  
  "Well, you're right there," admitted Bessie, "but all I 
  know is, wee bulls wobble, but they don't fall 
  down!"