Cheating once a week has never had any affect on my BF whether i am dieting or not. Why should it? Eating something I enjoy once a week is not going to kill me. It is when I eat things that I enjoy ALL WEEK that make the difference. Also, I don't get sick from all the sugar. All I feel is a bit of guilt from being a glutton at that moment and ofcourse a little bloated from all the water I am holding. But, there is nothing wrong with it. Also, i am not trying to gain weight right now so I don't know what you are talking about.