During the Q&A segment of 'Knowing Brothers', the model stated that she developed a special talent for tasting from going on diets all the time which required no seasoning in her food. She said, "Because I was eating egg whites every day for a month, I started to develop this ability to be able to taste both sweetness and saltiness from the egg whites. I can't drink water outside either because even between water, I'm able to differentiate the tastes."
Heechul then asked how she feels after going on such difficult diets. She answered, "It gets harder...I was actually planning to retire at the age of 30. I didn't know I was going to be a model for this long. As I gain more weight with age, I can't do anything else but exercise more and have to go on stricter diets. So when dieting becomes harder and harder, I always think I want to retire soon."