The Scorpion and the Frog is an animal fable about a scorpion asking a frog to carry him across a river. The frog is afraid of being stung during the trip, but the scorpion argues that if it stung the frog, the frog would sink and the scorpion would drown. The frog agrees and begins carrying the scorpion, but midway across the river the scorpion does indeed sting the frog, dooming them both. When asked why, the scorpion points out that this is its nature.
A friend told me this story about a previous relationship she had. I actually found it disturbing and later that week illustrated the story as you see here.