Social science lessons in school.
The teacher is trying to motivate the upper classes to study: "You know, the future American President Abraham Lincoln had a very complacent wife and when she got him, and this happened very often, he went to the library and there was engaged in self-education. In his memoirs, he noted that it helped him become president!"
A silent whisper from the gallery: "He simply didn't have a garage, and so he would sleep."