I reckon most of us knew this already, but it's still interesting:

Here’s a thought that has occurred to a lot of weight-conscious people: If fatty, salty foods are so bad for us, why do we crave them? Shouldn’t our bodies, evolving over many millennia, naturally want to eat foods that are good for us?

Cardiologist Lee Goldman examines this paradox in a larger context in his new book, “Too Much of a Good Thing: How Four Key Traits Are Now Killing Us.” He goes beyond diet issues to talk about survival mechanisms that worked well for thousands of generations but have now turned against human health:

● A craving for high-calorie foods and the ability to store excess calories as fat: These traits helped our ancestors survive when food was scarce; today, he says, they explain why so many Americans are dangerously overweight or obese.

https://www.washingtonpost.com/national/health-science/how-our-survival-mechanisms-are-killing-us/2015/12/07/e39d9564-9882-11e5-b499-76cbec161973_story.html

A combination of things then: Forced diet and actually having to work physically hard to get your food. Oh, and no TV & Internet.

Somewhat oddly, with the little supplement I take, garcinia cambogia, I actually do have strong cravings for healthy foods like lean meats, fresh fruits vegetables. I don't crave sugar (other than in fruit) or rich desserts. I enjoy healthy fats like avocado but I can't say I crave them more than green vegetables. In other words, kind of unnatural. Salt is another matter. I don't exactly crave it but I definitely like it a lot. Something to be more aware of.

Somewhat oddly, with the little supplement I take, garcinia cambogia, I actually do have strong cravings for healthy foods like lean meats, fresh fruits vegetables. I don't crave sugar (other than in fruit) or rich desserts. I enjoy healthy fats like avocado but I can't say I crave them more than green vegetables. In other words, kind of unnatural. Salt is another matter. I don't exactly crave it but I definitely like it a lot. Something to be more aware of.

yes placebos do work.

Somewhat oddly, with the little supplement I take, garcinia cambogia, I actually do have strong cravings for healthy foods like lean meats, fresh fruits vegetables. I don't crave sugar (other than in fruit) or rich desserts. I enjoy healthy fats like avocado but I can't say I crave them more than green vegetables. In other words, kind of unnatural. Salt is another matter. I don't exactly crave it but I definitely like it a lot. Something to be more aware of.

yes placebos do work.

No magic pills? ... Noooo ...

http://www.healthline.com/health/garcinia-cambogia-weight-loss#Overview1