This might not be the right place to post this, but what the hey, I read this and it helped to feel motivated to eat fewer calories.
I read that when you burn calories, your body produces free radicals in order to burn them, which are damaging to your body and can cause, among other things, cancer.
According to this magazine (UK's Zest, which I love and adore), if you eat 1500 calories or less in your daily diet, you have fewer calories to burn, you produce fewer free radicals, and you can increase your life expectancy by up to 7 years.
I do have a few niggling questions about this claim (such as wouldn't athletes then have a higher rate of cancer, because they consume and burn higher calories?) but whether it's true or not, it made me want to eat fewer calories.