Instinctual Lyrics?

I wrote almost all my songs as the music first and the words second.  The music just come naturally, and I can edit it to fit in words that work well, but I have not written a whole song and then tried to write music to fit it.  There is something about instinctually putting words to the music I already have that I find oddly satisfying.  I know that people edit their songs all the time, but how often do they edit them?  I feel like the music happens and then some lyrics happen when I am ready...anyone else want to share their process?