Body language

I checked the expression "body language" in a dictionary and found that it is an uncountable noun. Before I consulted a dictionary, I had been thinking that there are several body languages as there are a lot of spoken and written languages. What I wanted to say in the last post of this thread is that it is difficult to master different body languages in different cultures. What do you think of the expression "different body languages?" Is it uncommon?

They say there are seven universal emotions: joy, anger, sadness, surprise, fear, disgust, and contempt. I suppose that a good actor should be able to express mixed ones of these emotions or conceal these emotions.

If it is true that some human expressions are almost involuntary and are hard to control by the actor, people who have mastered controlling their emotions can manage their impressions freely by performing involuntary expressions voluntarily. Although it is not a deplorable thing that some "actors" do not need eye lotion to shed tears instantly, it is very sad that a lot of people are forced to be smiling anytime at work.

Mac or Windows?

I bought a new computer named Mac mini. The OS of that computer is Mac OS X 10.6, that is, Snow Leopard. I am very satisfied with the interface and performance of the system, which is based on the UNIX OS. But the problem is that Mac computers are made only by Apple computer. No other companies sell Mac computers, and we cannot assemble Mac-compatible machines by ourselves. What do you think of this?

Clues to the writer's sex and age

In the Japanese language, the first person can be watashi, watakushi, ore, boku, atai, and so on. Besides, sentence endings are used differently by different people. Sometimes, by taking notice of these differences you can guess the writer's sex and age. I think that this does not apply to the English language; I is I regardless of sex, and so on. Are there any clues to sex and age in written English ?

Why do some people not show any interest in learning a foreign language?

My guess is as follows:
1) They might think that their mother tongues could be deformed by studying "strange" foreign languages.
2) They have little interest in the things that are not around them.
3) They have a lot of other things that they can enjoy doing.