Why am I awake

6:09 and I have been awake for at least half an hour.
Thinking thoughts on the future, the present and sometimes the past.
I know it was the cats that woke me and my roommate running back and forth that kept me awake... but now it is quiet except in my head.
Why am I not sleeping?
I did not have extra caffeine last night.
I do not have any pressing matters.
I am not concerned for anyone's safety.
I am not accustomed to being awake at this time.
It makes me want to write but I don't really have the patience.
Oh well...