I do sometimes wonder, though, when overweight people insist that they eat healthily/not very much.
Before I was married, I was in a flatshare with 2 nurses, both not exactly fat, but def. not slim, either. Whenever they were making meals when I was there (not all the time) it was, 'Oh, just a bit of lettuce for me,' etc.
However I came home unexpectedly one lunchtime when they were both off - and found them tucking into a huge roast dinner with loads of roast potatoes, Yorkshire pud, etc., and a big pudding and cream ready for afterwards.
Don't get me wrong - I honestly couldn't have given a toss what they did or didn't eat - but they both went hot pink with guilt at being 'caught' tucking in!
Bit of a revelation TBH. Until then I'd genuinely believed that they lived off salads.