This joke involves an elephant who is walking through the jungle.  
And all of a sudden, he falls into a pit and is stuck there.  The 
elephant is stuck in this pit and realizes that he is going to die, 
so naturally he start to scream.  By chance, a chicken hears the 
screaming of the elephant and decides to investigate.

 He sees the elephant stuck in the pit and shouts to the elephant: 
"Don't worry, I am going to save you."
   The chicken then calls on the King of the Jungle.  The King 
of the Jungle promptly arrives in his *Red Porsche*.  He throws 
a rope from the Porsche into the pit, the elephant ties it around 
himself and the King of the Jungle pulls him out of the pit.  The 
elephant is saved (loud applause).  So grateful is the elephant to 
the chicken that he promises him that he will one day do the same 
for him (if the chicken should ever be in mortal danger).

   As chance would have it, the next week the elephant is walking 
through the jungle and hears the screaming of a chicken.  He 
wanders over and sees that his friend the chicken is stuck in a 
pit. (ohh, gosh)  The elephant shouts, "Don't worry chicken I 
will save you."

  So the elephant throws his tail into the pit.  However this 
tail is too small and the chicken cannot reach it.  Undeterred 
by this, the elephant throws in his trunk, but, alas, this also 
is too small.  As a last desperate effort, the elephant throws 
in his his dick.  Success!  The chicken grabs the elephants 
enormous dick and climbs out to safety.

Moral of the story: "If you have a big dick you don't need 
  a red Porsche to get a chick."