I am, and have always been, slim. I don't exercise more than anyone else, I don't eat less than lots of people I know. I used to think it was because I smoked, but then I gave up and stayed slim. The only reason I can think of is that I never eat biscuits and all the women I have ever worked with, particularly nurses and teachers, I don't know why, seem to obsess about biscuits. 'OOh, I am naughty...Oooh, which one shall I have?'
A non-biscuit eater is quite socially excluded. Biscuits must be the answer. Are they really so nice that you have to eat them every tea break? Is it really that difficult to just not eat, or think about biscuits? I have a friend who comes to my house armed with her own biscuits and she thinks we are really funny because we never have any in the house.
(I keep little packets of 3 biscuits in now, as I have realised that not having an interest in biscuits is socially unacceptable. I get them free when I buy a coffee in the pub).
Biscuits aren't even nice.