A family had twin boys whose only resemblance to each other was their
 looks. If one felt it was too hot, the other thought it was too cold. If
 one said the TV was too loud, the other claimed the volume needed to be
 turned up. Opposite in every way, one was an eternal optimist, the other a
 doom and gloom pessimist.
 
 Just to see what would happen, on Christmas, their father loaded the
 pessimist's room with every imaginable toy and game. The optimist's room he
 loaded with horse manure.
 
 That night the father passed by the pessimist's room and found him sitting
 amid his new gifts crying bitterly.
 
 "Why are you crying?" the father asked.
 
 "Because my friends will be jealous, I'll have to read all these
 instructions before I can do anything with this stuff, I'll constantly need
 batteries, and my toys will eventually get broken," answered the pessimist
 twin.
 
 Passing the optimist twin's room, the father found him dancing for joy in
 the pile of manure. "What are you so happy about?" he asked.
 
 To which his optimist twin replied, "There's got to be a pony in here
 somewhere!"