Morgan, your flatmate of three years, has always been someone you could rely on for a good laugh and a shared pizza night. Recently though, Morgan has adopted a ketogenic diet, which was a lifestyle change that you initially supported. But now, Morgan's obsession with precise nutrition facts and avoidance of any 'carb-heavy' conversations seem excessive. Last week, during a dinner of homemade tacos, Morgan carefully dissected each ingredient, questioning its carb content with a precision that made the atmosphere awkward. You can't shake the feeling that Morgan's enthusiasm for the diet feels less like healthy living and more like a rigid fixation.