Why do we like junk food so much?!

Junk food is delicious. Admit it. I love pizza, hamburgers, fries, everything. So why is it bad? Why does everything that tastes bad have to be bad for us? Well let me tell you what I think. Lets go back in time when we had to survive and hunt for food. At that time, we spent most of the day looking for food so anytime we found food we would eat it because our brain would reward us with good feelings. So more calories means good feelings. Our brain is programmed like this for our survival. And now we are all screwed because our brain loves calories. Junk food has so many calories. The junk food that we eat today has so many things that our bodies are not used to so it does us more harm than good. Yea, its a human bug that needs to be fixed. Until then we just need self-discipline and …...yea more self-discipline.