On a brisk winter day a girl walking home happens across a snake. The snake pleads with her to place it in her winter coat because it will freeze to death soon.
The girl says “You area snake and I know what you can do. I think not.”
The snake replies “If you do not help me I will die here and what good will that do? Save me.”
The girl concedes to the snake’s rationale and puts the snake in her jacket to keep it warm. She continues along her walk home but then she feels a sharp pain in her side. The snake drops out and begins to slither away. The girl says “Why? I saved you?”.
The snake simply replies “You knew what I was when you found me”.