Long shot, but in the late 2000's there was a TV show I caught, maybe on channel 4 in the UK, it was some sort of sitcom or short series. There was a woman who had gained weight and couldn't squeeze her ass into her dress, her friends maybe fun of her and in turn she lost weight and could fit into her dress. Now content she decided to fest ( I seem to recall on Jam sandwiches lol) resulting in her now not able to fit back into the dress.
It was the sort of spark that opened my mind to this sort of thing.