Question two.......

Switching between languages or manner of speech seems to be a natural habit of people in a civilized culture. I have noticed myself changing how I talk depending on the environment and people around me. For example, with my friends I will take on a more relaxed tone and the conversation flows naturally. I don't have to think so much, just say what I feel. However, when I am at work or talking to my boss, I take on a more reserved, formal type of speech. My words are more carefully chosen.
It seems that we change the way we talk according to what is called for, and how comfortable we are with our environment. I will speak like a 19-year-old with my friends and family because that is how they see me and the level on which they expect me to communicate. But in a professional or academic place people usually choose their words more carefully and try to communicate clearly and effectively.
Our speaking changes just as our posture and mannerisms change. Another cause of this is how we wish to be perceived by those listening. I personally would like to be perceived as someone who thinks clearly and therefore I continue to work on my clarity and using less "slang" in my speech.