Teaching your language

I never thought about my own language that much. It has been normal for me. There is no other way to write a word or how to pronounce it in a certain way . Now that I have started putting together a language class, I have to be able to come up with an answer for these questions. What is the difference between Ich liebe dich and Ich habe dich lieb (it is pretty significant!). Or why is plötzlich such an interesting word? When people try to pick up a new language they question everything. Nothing seems to be normal for them. They have to understand the rules of the language, from the very core of it. The teacher is the one to guide them through a jungle of rules and contradictions. This is going to be my task for the upcoming weeks. I want to show them more. Who are Germans? Are we all blonde, tall, beer drinkers, Wurst eaters, Lederhosen or Dirndel wearers? Are we all born with the ability to drive cars and to construct machines? Do we all live for working and we do not have a sense of humour? I would like for the Germans to show my students what is truth and what is false about the statements above. For the better understanding of a language, you have to learn more then grammar and vocabulary. It's also about the culture. Why do they have so many words for a single situation? Why and how can they form sheer endless words out of nowhere? It this humour or is he serious? Is it harder to teach your language then to learn a new one, maybe?