" How can I have put on 3 lbs. since the middle of the night? I was 130 when I went to bed, 128 at 4 a.m. and 131 when I got up. I can understand weight coming off—it could have evaporated or passed out of the body into the toilet—but how could it be put on? Could food react chemically with other food, double its density and volume, and solidify into even heavier and denser hard fat? "

― Helen Fielding , Bridget Jones's Diary (Bridget Jones, #1)