What is cool?

First thing I did was to ask my friends what cool mean. They usually were saying : " You don't know? Super, excellent, great "

And what is cool?
"Fashion, music, way you look, when you are different or when you follow the trends"

And why this is cool?
"Ehm….. Whyy???? I don't know… why you are asking?"

So I think saying what is cool is not so hard. We just don’t know why is it cool.
'Cool' is changing really often. Everytime when something stars to be cool , everyone starts to follow it . Than this thing is no longer cool so something else is now cool and so on. Finding it is not an easy challenge. Every firm which sell things to teens , keep looking for meaning of this word. 'Cool 'will always change. No matter what we can’t stop it. As long as time goes cool will be changing.