At least most of the songs I do love, the titles are parts of the Lyrics.
With no slight to our own JU masters of lyrics and melody, my favorite song has to be Unchained Melody. By the Righteous Brothers. To tell the truthm I do like most of their work, but they are not my favorite band/group/individual.
But my favorite song is Unchained Melody. Which has no real connection to the Lyrics (I suspect it does to them, but not to the average listener). Yet the melody and lyrics are such that I am swept away in rapture every time I hear the song. It is that good! (Second on the list is Candle of Life, which is mentioned in the Lyrics).
So what is it about Unchained Melody that moves me so much (and others I gather)? I dont really know. It is a heart tugger and a real sweet song. But I have heard many of both in my life, yet even though they are good, they are not Unchained Melody.
I guess it is the individuality of us that we each find a song that hits us in just the right place. And we see it as our favorite.
For me, it is that crazy song whose title has nothing to do with the Lyrics. And it will always stick in my mind (even driving out Barney, Sean! ).