Last time I saw Mark Cuban this mad is when the Mavs were down in the fourth quarter. Now, it’s about his “ultimate pet peeve”: open mouth chewing. In this first drop of the "CSI: Dumb Questions" miniseries, Nayeema ventures out to address this billionaire’s dumb Q – why do people chew with their mouths open? The investigation takes her across the pond to Oxford University, where she meets Dr. Charles Spence, an experimental psychologist/gastrophysicist with an English accent and quite un-English dining sensibilities.

Hear the full, fun Mark Cuban convo on Smart Girl Dumb Questions and hit follow or subscribe.

Trigger warning: this episode contains chewing sounds. It’s definitely one to share with the open mouth chewers in your life … or, if you chew openly, you might feel validated sending it to anyone who’s ever complained!

Follow us on IG, TikTok & YouTube @smartgirldumbquestions. You can find Nayeema on Instagram or X, and you can find Mark on IG, X or Bluesky. Both will be chewing with their mouths closed.

For more crackle and crunch, check out Dr. Charles Spence’s work in Gastrophysics: The New Science of Eating and Sensehacking.

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Why Chew With Your Mouth Open? A Billionaire & Oxford Gastrophysicist Walk Into SGDQ