To write or not to write

Yesterday while preparing myself to write the next chapter for the sequel to my already published book. I decided to sit outside in the back yard and enjoy the shade of our large maple tree. My mind all of a sudden was no longer on the book I was working on, but on the poem that I seemed to be composing. How could I get so distracted? I was not sure if it my getting old and my mind wanders, or if it is what writers do? Since I have never written a book before A Hairdresser’s Diary I could not answer my own question. I always only wrote poetry. I guess I am not the only one out there that has this distracting mind. I know when I was painting I sometimes would have a poem floating through my head at the same time but this was different. I almost felt like I was cheating on my book lol. So am I getting old or is this a writers infliction? Bye the way this painting in one I did while composing a poem in my head. When I finished the painting I forgot to write the poem down so now it is lost. Someday it will resurface when I least expect it to.