$星巴克(SBUX)$ 在Reddit上看到一个美国人对星巴克的点评，很好地解释了甜食成瘾的原因：
This is why we say our customers aren't addicted to the caffeine, they're addicted to the sugar. They just don't realize it.
Sugar consumption is legit a huge problem in the US, and everyone here is so used to sweetness that it takes a lot more sugar for it to register. It's especially bad in drinks, and I think people are slowly becoming more aware of it, but there's no good way to let everyone know without putting a sugar warning in the store or something. We have calorie counts on the menu, but people don't understand just how much of that comes from the sugar.