Why are humans very obsessed with how much they weigh?

If a woman weighs a few hundred pounds maybe it would be painful for the knees, but is the motivation to lose weight mainly for the attention of the opposite sex, self-hatred or well what is the main motivation? If a woman wants to lose weight the reasons that come to mind might be because they still want to be asked out by the gender they are attracted too or they have self-esteem issues? Or maybe it is not these reasons, why are people, magazines and humans in general, even some men very preoccupied with weight loss? Why is so important?

Will a man really not ask out a pretty perhaps woman out, great sense of humour, confidence and personality out just because she is hefty? Or for the reader is it important for her gender of attraction to be a certain weight? Or do some men or people prefer their gender of attraction to be hefty?

Is it really of extreme important for a person to worry all the time about their weight? If so why?

I am just curious. My mother never raised me into the notion that I should always be worrying what or how many pounds I am. My mother always told me that my weight was fine.

So maybe the major factor in worrying intensely about weight loss or the major motivations are courtship and self-hatred or self-esteem issues? Why does the reader, if they do, worry or care about their weight or how many pounds they weigh?

If fat people still are able to get romantic relationships and to get laid then- or are they able to? If they are able too, if a person maybe a little over weight is fat will they still be able to be courted if they have a sense of humour, style or personality?

Is how fat the reader is subjective or in the eye of the beholder?