I can imagine it because I have written many songs myself. Some of them very quickly. What I can't imagine is that the song that comes out is "Lovesick Blues". And that the one after that is "Honkey Tonkin". And the one after that is "kalija". And then "I'm so lonesome I could cry". Then "Your cheatin heart." I don't know a would be songwriter ou there who wouldn't trade a gonad for just one of those tunes.
Well, you are very blessed to have that musical talent. I always wanted to be able to play the piano. After I grew up I bought a piano and took lessons - but nothing worthwhile came from it. I was always amazed at the people that could just hear a melody and sit down and play it. That is natural talent.
Maybe you have heard of the 6 year old that plays classical music by ear. Has been playing since he was 3.