The essential characteristic of bulimics is the combination of excessive food intake with over-concern about weight gain. Bulimics are not willing to be happily fat. They want to overeat and they want to have normal weight. Unsurprisingly, they are often impulsive, rebellious, and emotionally labile. Many or most bulimics have normal body weight but they achieve that goal with a bizarre combination of overeating and fasting. They frequently view themselves as fat even though they may have normal body weight.