Why do fats make the worst teachers? I'm doing CS at my school, and all my thin teachers were compassionate, fair, and respectful. They had no ego problems and curved and wanted to see us succeed.  I had a fatass for a teacher this quarter and he was so ridiculous, overly obsessed with catching cheaters, refusing to curve, condescending and with a massive ego problem. He probably had to be a dick because he hasn't seen his dick in years.