I don't know if this is a well known tale in English but it's a classic here in Spain. This tale shows you how people can manipulate you to get what they are after.
For those who don't know the fox wanted the cheese and told the crow how very nice his voice was. He asked it to sing and made it forget about the cheese...sly character..
Esta es una fábula muy conocida. El cuervo y la zorra, esta es mi versión de los personajes. Para el que no conozca la historia trata simplemente de como manipula la zorra al cuervo para conseguir quitar el queso al cuervo.