Fighting Fat at Glamoursmith

I've just come back from a ginormous veggie meal at The Gate in Hammersmith (according to Metro, Alicia Silverstone's favourite restaurant in London) and feel like Monty Python's Mr Creosote, so thought it was kinda appropriate to see a really slim woman reading a book about how to Fight Fat After 40 at Glamoursmith.







Why is it mainly slim people who read dieting books, or is this a myth and I just think that it's only slim people who read dieting books? I was tempted to ask her for a copy as (fooking ell) I will be 40 later this year. She didn't look remotely 40 though so I'm hoping she was just reading for research purposes. Hopefully, she would have said to me "Why you don't look almost 40 yourself either, surely you are just asking me to get a story for your blog, and stop taking pictures of me you mad stalking woman".