Until a scientist in Australia proved ulcers were caused by bacteria. So consensus was wrong. Very wrong.

Interestingly, among people who have Helicobacter pylori in their stomachs, only a subset develops ulcers. Some people have bacteria, but no ulcer. I don't know if there is a consensus on why this happens, but it is correlated with stress. If you are stressed and have h.pylori, you are more likely to develop an ulcer, compared to h.pylori and no stress.

So the consensus was wrong, but still not a hundred percent wrong.

Source: Why Zebras Don't Get Ulcers, Third Edition http://www.amazon.com/Zebras-Dont-Ulcers-Third-Edition/dp/08...

Quite a fascinating book on stress.

Good to know is that the first time you take cocaine, it works about 1000 times stronger than the natural drugs in your brain, and thus the natural highs you get. These are the normal highs you get when you score a goal in sports, when you get an A for your exam, when the girl or boy you like wants to kiss you etc.

So the first time(s) you use cocaine, you get a high that's incredible. The second time, this effect is about 100 times stronger than usual, so 10 times less strong than the first time.

Then you want to go back to that first unbelievable fantastic time, and take more. You may get at 200, but the more often you take it, the less the effect, and the stronger the craving for it. This is more or less how (this) addiction works.

The numbers I use here may be different, but it shows more or less how it works. Well as far as I understood it from the book Why Zebras don't get Ulcers which is about stress and all its side effects.

http://www.amazon.com/Zebras-Dont-Ulcers-Third-Edition/dp/08...