You've no doubt read the old fable about the scorpion and the frog. It illustrates how man's nature is much more devious and controlling than is his logic.
The fable says how, "One day a scorpion arrived at the bank of a river he wanted to cross, but there was no bridge. He asked a frog that was sitting nearby if he would take him across the river on his back. The frog refused and said, 'I will not, because you will sting me.'
"The scorpion replied, 'It would be foolish for me to sting you because then we would both drown.'
"The frog saw the logic in the scorpion's words, and agreed to carry the scorpion across. But when they were halfway across the river the scorpion stung the frog. The stunned frog asked, 'Why did you sting me? Now we will both die!'
"The scorpion replied, 'Because I'm a scorpion … and that's what scorpions do.'"
