It seems when the creator was making the world, He called man aside and bestowed upon him twenty (20) years of normal sex life. Man was horrified: "Only 20 years?" but the Creator didn't budge. That is all He would grant him.
Then He called the monkey, and gave him 20 years. "But I don't need 20 years," said the monkey. "Ten is plenty."
Man spoke up and said, "Can't I have the other 10 years?" the monkey agreed.
Then the Creator called the lion and gave him 20 years. The lion said he only needs 10 years. Again the man asked, "Can't I have the other 10 years?" "Of course!" roared the lion.
Then came the donkey. He was given 20 years and like the others said 10 years was all he needed. Man asked again for spare 10 years and again received them.
This explains why man has 20 years of normal sex life, 10 years of monkeying around, 10 years of lion about it, and 10 years of making an ass of himself.
