I was going to say NO, however I diet once a week and am often starving, and yet do not eat as I only eat 500 calories on that day.
So while, during the rest of the week, I have no willpower, i seem to have it on that one day.
Last night I just could not stop eating sweet rubbish! Try as I could, I kept saying, tomorrow I will have an apple instead of chocolate and sweet cake etc.