WHAT MAKES YOU THINK??????

It is not the thought that makes you think.
It also is not a topic that makes you think.
but still you think why????????
ok, it is the mind that enables you to think
BUT WHY DO YOU THINK??
because we need to...
oh ok i dont know
maybe because most of the time
i am thinking about useless things
and when i realise its wastage of time
i still donot stop thinking
i dont know why?????
i could never understand this
and till date i am lost in my thoughts
wiyhout any reasons without any cause
oh god can somebody tell me
WHY DOES ONE THINKS????????