She was a doctor and had an obese patient who was struggling to lose weight, he complained that he had changed his diet to be very healthy but it still didn't help

gm: "ok let's start with breakfast, what do you usually eat?"

patient: "oh, just a plain omelette - I don't even use butter or oil!"

gm: "ok that sounds good, tell me exactly how you prepare it"

patient: "well, I crack 12 eggs into a pan..."

Apparently they saw they were sold by the dozen and thought that was the suggested serving size