Repetative books authors

When I am home I usually keep radio on all the time. So, I get to hear same book author interviewed in 2-3 different radio stations; some times radio stations are separated by continent.

What I find interesting is authors quote same example in every one of those interviews. That somewhat disappoints me because it sounds premeditated. I usually imagine writers as individuals with 100 eyes, and this repetitions paints them as less spontaneous.

Here is latest example: David Kessler, author of 'The End of Overeating', was trying explain the grip that food has on peoples' mind; he even used word addiction. And in the course of this description, he quoted exactly same example on both BBC and NPR. The repeated line is, I start to salivate in anticipation of Chinese dumplings as soon as his flight lands in San Francisco.