I think when a farmer finishes a task he then has a debate with himself about what he should do next. I imagine it going something like this:

• "OK, what should I do next?"
  "Fishing?" "Nah, the algae stops that."
  "Harvest coconuts?" "No, I did that last time."
  "Have a drink?" "I'm not really thirsty."
  "Enjoy the pool?" "The Guiding Hand wouldn't be happy."
  "Harvest the crops?" "AARGH! I hate turnips!"

(Runs away).