Movies without music would be boring, to say the least.
Even during the silent era, theatres employed pianists to accompany the picture with live performances.
In spite of that, some of the Theme songs can do just fine on their own. In fact some of them outshine the films they were in, and become instantly recognizable to many people who might or might not have seen the source.

Which ones are popping to your head right now? Is there any personal experience that goes with it?
Please, share your story, as well post (or embed) the link to the Theme.