The Mexican people, once they have happened on a good food, he thought, flay the thing to distraction. Ham and eggs every morning now for two weeks. Since arriving in Guanajuato, bearing his typewriter, it had been the same thing each morning at nine. He stared at his plate, gently grieved.("The Candy Skull")

Adjunct teachers are the professorial equivalent of the migrant Mexican farm laborers hired during harvest. If you can get a good contract at the same farm every year, where the farmer pays you on time and doesn't cheat or abuse you, then it's in your best interest to show up consistently from year to year.