"How many calories are you supposed to eat if you’re on a diet?" he said.
"About a thousand. Well, I usually aim for a thousand and come in at about fifteen hundred," I said, realizing as I said it that the last bit wasn’t strictly true.
"A thousand?" said Tom, incredulously. "But I thought you needed two thousand just to survive."
I looked at him nonplussed. I realized that I have spent so many years being on a diet that the idea that you might actually need calories to survive has been completely wiped out of my consciousness.
Helen Fielding, Bridget Jones’s Diary
This was kind of an A HA! moment for me.