That's an argument that's still made, privately, in the industry: Women want to hear their pre-bedtime monologue jokes from a man, while Oprah Winfrey, Ellen DeGeneres and Katie Couric are welcome in daytime.

NPR: Late-Night Network Shows Still A White Men's Club

Panic tends to set in the day before the exam, with 61% staying up late, 40% up all night, and the average bedtime pre-exam being 2.19 am, according to the survey.

BBC: One in three students wears 'lucky exam underwear'