"See, the scorpion needs to get across the river-- and he asks the swan for a ride. And the swan figures-- `It's not much of a risk. The scorpion wouldn't sting the creature who's carrying him over the raging river.'"So, about halfway across, the scorpion stings the swan-- and as they're both being swept to their death-- the swan asks the scorpion-- `I was helping you. Why did you sting me?' And the scorpion answers-- "
"`It's what I do.'"