@windtank well a litmus test is used to test materials for acidity.  So the list is tongue in cheek playing with the idea of acid as something that is sour, biting or sarcastic.  I also hope that list gets one thinking about the importance of attitude, outlook and perspective. I happen to like/love/get a huge kick out most of the things on the above list.  They are a fundamental part of life in my Bulgaria but if you can't see yourself embracing these things in Bulgaria, I have a hunch you'll spend a huge amount of time being frustrated rather than enjoying the country.