The context of the following conversation is Even though their diet was going well, Jordan drank a soda as a small treat.:
Jordan says I've been doing so well on my diet, but I drank a soda today..
The friend responds If the only thing you did was drink one soda, that isn't too bad..
Jordan responds I know, but I'd rather I could stay on my diet without cheating at all..
The friend responds Most people can't do that. You don't want to always feel deprived..
Jordan responds I know. That's what makes it so hard, you just want what you can't have..
The friend responds That's why a little cheating is good. It doesn't really hurt the diet, but you're not constantly thinking about what you can't have..