Add this to your photography know-how and skills and make more interesting, natural and voyeuristic compositions through "subframing"..
"Subframing" is a technique in which you use elements in your image to frame a subject. As photography vlogger Ted Forbes would describe it, a "a picture in a picture". The technique makes clever use of other, non-subject elements and makes them vital to your photograph. It's like mimicking the naked human eye, and manifesting the vision through a captured image.
Learn more about this technique here.
Preview image was taken from the video.