When you're really tired sleep is what you want to do like when you're really hungry you want to eat.

你累了，就会想睡觉,正如你饿了想吃东西一样。

耶鲁公开课 - 心理学导论课程节选

But if this is the reason, it's what people like to eat, what would you do about that?

但是如果原因是,垃圾食品合乎人们的胃口,你应该怎么做呢

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选