A scorpion, which cannot swim, asks a frog to carry it across a river on the frog's back. The frog hesitates, afraid of being stung by the scorpion, but the scorpion argues that if it did that, they would both drown. The frog considers this argument sensible and agrees to transport the scorpion. Midway across the river, the scorpion stings the frog anyway, dooming them both. The dying frog asks the scorpion why it stung despite knowing the consequence, to which the scorpion replies: "I couldn't help it. It's in my nature.