Fat while in Korea

I have lived in Korea for three years now I am a big man fairly good looking- I am happily married and probably have one of the top ten cutest sons in Korea. But for some reason Koreans ESPECIALLY women think I NEED to loose weight so I will be "more" good looking. Why? Does the way I look make me do my job better (maybe if I were a model, but I am not)! I am a teacher- will children learn better if I loose weight? I speak to single men and women in the neighborhood, at work, on line, and at the gym. They are constantly "dieting" even though they weigh less than they should already! Their main intent is to get a mate - I guess one question is why do they do so much work on the outside and never realize to work on their attitude and personality? Another part of this question is - why do Koreans seem to be so preoccupied with appearances when their personalities push people away? Many have acted like they are concerned about the health problems of being overweight, but seem to be unaware of the health problems associated with binge eating and drinking or smoking! I also wonder if they realize the mindset that is perpetuated is what keeps the suicide and depression rate so high here?! I also want to know if Koreans realize that fat people have just as much to contribute to society as thin people!