The Scorpion and the Turtle

One lazy afternoon day a turtle was swimming happily along a lake. As the turtle was nearing land he heard a scorpion hail it from the muddy shore. A scorpion, being a very poor swimmer, asked the turtle if he would carry him on his back across the lake. The turtle thought it was the craziest thing he ever heard, “Why would I carry you on my back?” he boomed, ‘You’ll sting me while I’m swimming and I’ll drown.”
“My dear turtle friend,” laughed the scorpion, “if I were to sting you, you would drown and I would go down with you and drown as well. Now where is the logic in that?”
The turtle pondered this for a moment, and eventually saw the logic in the scorpion’s statement. “You’re right!” said the turtle with a smile. “Hop on!” So the scorpion climbed aboard and the turtle paddled his big fins in the water. Halfway across the lake the scorpion gave the turtle a big sting, and he started to drown. As they both sank into the water the turtle turned to the scorpion with a tear in his eye. “My dear scorpion friend, why did you sting me? Now we are both going to drown…” the turtle was gasping for air. “Where is the… logic in that?”
“It has nothing to do with logic” the scorpion sadly replied, “it’s just my nature.”