The first one reveals that this started circulating when President Clinton was in office!

 

 Some lions mate over 50 times a day. 
 According to Men's Health magazine, the male lion can have
 sex as often as 100 times a day. In fact, at 103 times a
 day, the other animals stop calling him "King of the Jungle"
 and start calling him "President of the United States." 

 Tigers have striped skin, not just striped fur.

 The muzzle of a lion is like a fingerprint -
    no two lions have the same pattern of whiskers.

 A hungry lion was roaming through the jungle looking
 for something to eat.  He came across two men.  One was
 sitting under a tree and reading a book; the other was
 typing away on his typewriter.  The lion quickly pounced
 on the man reading the book and devoured him.  Even the
 king of the jungle knows that readers digest and writers
 cramp.

 

 Two guys are chatting in a bar.  One says "Did you know
 that lions have sex 10 to 15 times a night?"
 "Damn," says his friend. " and I just joined the Elks."