However, it is my habit. Sometimes, serious discussions make me tired, and I jump into good and pleasant humor to make me happy.
As far as I recognize myself, I don't tend to sarcasm, and if I seldom do that, it is not to annoy others or make them uneasy. I want to note them to something. Generally, I tend to friendship, and it makes no difference my audience is American, British, Iranian, Japanese, Chinese, Russian, North Korean, South Korean, Indian, Arab, Turkish, Australian, Scottish, Romanian, and so on. I look at them as humans. But I am not good with criminals from every nationality.
I wish to speak to the people who are gentle, fair, and knowledgeable. As I teach them some new things, I also learn some things from them. American are good people with high knowledge of technology and material science, minus every feeling of superiority (I am speaking about American people, not politicians).
Of course, aside from good citizenship in the West, I don't follow all the ideas and ideologies of Western philosophers and psychologists because some of their theories and ideologies are not according to real spirit and quality of humans.
Anyhow, tending to good humor has become one of my habits.