Both men and women feel attracted to a person who is bigger than him when his stomach is empty.
Scientists from King's University (UK) have found that people who sleep more than 90 minutes a day can limit their eating habits.
Scientists warn, birth control pills will be less effective in overweight women, and especially useless for women who weigh more than 80kg.
Professor Andrew Hill, a researcher at the Institute of Health Sciences at the University of Leeds in the UK, and colleagues conducted an experiment to understand children's views
The patient's body weight really affects the feelings of the doctor, because they tend to think and act negatively when meeting overweight people.