translation.en: Let’s start with sweet. Our sweet tooth is basically an evolved sugar detector, because sugar is high energy, and it’s just been wired up to the preferer, to put it very crudely, and that’s why we like sugar.
translation.zh: 从甜开始吧，我们馋甜的，其实是一种进化出来的糖探测器。 因为糖是高热量的，所以它就被大脑强化为我们的一项偏爱。 简单来讲，这就是为什么我们喜欢糖。