It helps to increase your demand for calories by increasing muscle mass. I am not fat, but I have legs and a bottom bigger than the rest of my body. I do not like them at all. I would like to know how I can lose weight in those parts. Unfortunately, spot reducing does not work.
Bodies come in all shapes and sizes.
You may be able to firm your lower body by concentrating exercise in those areas, such as walking. I've heard that it can take up to six months to lose a craving for something like chocolate. I think a craving is generated from deprivation. A more successful strategy may be to have a little chocolate on a regular basis, and set your limit on a small amount. Rather than never having chocolate at all.