A scorpion wanted to cross the river, but he couldn't swim, so he asked a frog for a lift. The frog replied "How do I know you won't sting me", the scorpion said "If I sting you, then you will drown, and I will drown with you". The frog agreed to give the scorpion a lift. Halfway across the river, the scorpion stung the frog, when the frog asked why, the scorpion replied "You have nice legs".