Why thin doesn't sell?

Why thin doesn't sell?
For obtain an answer I'm going to raise two questions:
Why are the fashion and the advertising industries so obsessed with thin models? Do you think that being thin still sells nowadays?

The fashion industry has traditionally used these thin models for the last few decades. This tendence started in the sixties when the best known models were very thin. As a result most fashionable clothes were made for thin people.
Because of this many woimen wanted to loose weight so that they could wear the latest fashions. In those days, being thin was in fashion and so models became thinner. This situation lasted quite a log time and those who made and sold clothes earned a lot of money.
things started to change when many young girls become obsessed with being thin and refused to eat. They became dangerously thin and had to go to hospital for special treatment. Some of them died. This condition is called anorexia

As a consequence doctors recomended that models who were very thin should not be fashion.. Since then, the situation has improved and although there are still some problems.

In conclusion, thin doesn't sell so well as it used to. And normal size models are usually more popular with the public.