I posted this as a comment on ExpectoRants, and thought I'd reproduce it here. This is an old joke I found in a pre-war hardbound compilation of jokes. With the stereotypes then, you can probably guess what the A and F stand for.
A: "Why are you just sleeping and fishing all day? You should be studying?"
A: "If you study well, you'll finish school and land a good job."
F: "What for?"
A: "If you land a good job, you'll be able to earn money."
F: "And then what?"
A: "With the money you'll be able to save up so you can retire."
F: "And then...?"
A: "And then you can just sleep and fish all day."